一种测量地理纬度的简易方法

我们生活在地球上往往需要知道自己所处的地理位置,特别是航海员、旅行者和探险家,他们知道自己所在的位置是很重要的,而地球上任意一点的位置是由经度和纬度来表示的,其经度值可以用时间(世界时)来确定,纬度值要用天文测量仪来测定,这里介绍两种测量纬度的简单方法.     

按百分比计算总成绩的简便方法

教师按百分比统计学生学科总成绩的计算往往比较繁杂、费时.若采用作者提出并证明的方法可在一定程度上简化这类计算,提高工作效率.     

判断存在手性碳原子的环己烷R/S的简便方法

归纳阐述了存在手性碳原子的环己烷判断R/S的方法为"环己烷的构象转为费歇尔时,环碳在横向,编号61234561a,e,上下交替换,奇碳a上e下,偶碳e上a下.对映体椅型结构互转变,编号顺变逆,ae,键基团位不变,-对映构型只是R变S,S变R",并应用举例.     

The new books on our shelves

Introductory Mechanical Drawing. By Albert A. Lacour and Glenn N. Shaeffer. Milwaukee: The Bruce Publishing Company, 1931. pp. 23.

Two Times Two Is Four. Adapted from the Swedish of Zacharias Topelins by Vera C. Himes. New York: Thomas Y. Crowell Company, 1931. Pp. 64.

Jean and Fanchon: Children of Fair France. By Virginia Olcott. New York: Silver, Burdett and Company, 1931. Pp. viii + 168.

Introduction to the Use of Standard Tests (Revised Edition). By Sidney L. Pressey and Luella Cole. New York: World Book Company, 1931. Pp. iii + 266.

Health Horizons. By Jean Broadhurst and Marion Olive Lerrigo. New York: Silver, Burdett and Company, 1931. Pp. i + 44.

Poems for Enjoyment. By Elias Lieberman. New York: Harper Brothers, 1931. Pp. v + 510.

Fabrics and Dress. By Lucy Rathbone and Elizabeth Tarpley. New York: Houghton Mifflin and Company, 1931. Pp. ix + 430.

Factors Influencing the Choice of Courses by Students in Certain Liberal Arts Colleges. By Helen Foss Weeks. New York: Columbia University, 1931. Pp. i + 62.

Manual for Expressing Educational Measures as Percentile Ranks. By Francis C. Buros and Oscar K. Buros. Yonkers: World Book Company, 1930. Pp. 27.

Mental and Interest Tests. By Lea Hamilton King. New York: Columbia University, 1931. Pp. 1 + 124.

The Bearing of Certain Personality Factors Other Than Intelligence on Academic Success. By Henry T. Tyler. New York: Columbia University, 1931. Pp. v + 88.

Psychology of Exceptional Children. By Norma V. Scheidemann. New York: Houghton Mifflin Company, 1931. Pp. i + 520.

Problems in School Supervision. By George C. Kyte. Boston: Houghton Mifflin Company, 1931. Pp. xiv + 214.

The Birch Bark Roll of Woodcraft. By Ernest Thompson Seton. New York: A. S. Barnes and Company, 1931. Pp. xii + 268.

How to be Interesting. By Professor Robert E. Rogers. Boston: L. C. Page & Company, 1931. Pp. xii + 170.

Grammar in Action. By J. C. Tressler. New York: D. C. Heath and Company, 1931. Pp. xii + 404.

Uncle Remus. By Joel Chandler Harris. New York: D. Appleton and Company, 1931. Pp. xxiii + 283.

Making the Most of High School. By Clyde M. Hill and Raymond D. Mosher. New York: Laidlaw Brothers, 1931. Pp. v + 288.

Modern Business Law. By Jay Finley Christ. New York: The Macmillan Company, 1930. Pp. xiv + 612.

Capital Outlay in Relation to a State's Minimum Educational Program. By Foster E. Grossnickle. New York: Columbia University, 1931. Pp. iii + 65.

Students' Marks in College Courses. By John E. Bohan. Minneapolis: University of Minneapolis Press, 1931. Pp. iii + 133.

The Influence of Training on Changes in Variability in Achievement. By Homer B. Reed. Albany: Psychological Review Company, 1931, Pp. 1+ 59.

Education and the Philosophy of Experimentalism, By John L. Childs. New York: The Century Company, 1931. Pp. vii + 264.

Progress in Adjusting Differences of Amount of Educational Opportunity Offered Under the County Unit Systems of Maryland and Utah. By L. John Nuttall, Jr. New York: Bureau of Publications, Teachers College, Columbia University, 1931. Pp. v + 105.

Modern Chemistry. By Charles E. Dull. New York: Henry Holt and Company, 1931. Pp. xii + 776.

An Introduction to Organic Chemistry. By Roger J. Williams. New York: D. Van Nostrand Co., 1931. Pp. iii + 585.

Educational Measurement in the High School. By C. W. Odell. New York: The Century Company, 1930. Pp. 641.

Furniture Boys Like to Build. By Richard Shaver. Milwaukee: The Bruce Publishing Company, 1931. Pp. 216.

General Metal Work. By Alfred B. Grayshon. New York: D. Van Nostrand Company, 1930. Pp. viii + 206.

Coloring, Finishing, and Painting Wood. By A. C. Newell. Peoria: The Manual Arts Press, 1930. Pp. 419.

A Gateway to Music. By Wilton W. Blanche and Jay Speck. Boston: D. C. Heath and Company, 1931. Pp. v + 178.

Plane Geometry Work Book, By Theodore Herberg and Sinclair J. Wilson. Boston: D. C. Heath and Company, 1931.

Standard Service Arithmetics, Grades One and Two. By J. W. Studebaker, F. B. Knight and W. C. Findley. Chicago: Scott, Foresman and Company, 1929. Pp. 154.

Introductory Algebra. By Alan Johnson and Arthur W. Belcher. Chicago: Laurel Book Company, 1930. Pp. 407.

Fabrics and Clothing. By Sara MacBride and Ellen Beers McGowan. New York: The Macmillan Company, 1931. Pp. viii + 225.

Mathematics, Seventh School Year. By Fred Engelhardt and Mary L. Edwards. New York: D. Appleton and Company, 1931. Pp. xvi + 232.     

The new books on our shelves

Principles of Clothing Selection. By Helen Goodrich Butterick. New York: The Macmillan Company, 1930, Pp. xiii + 219.

Fads and Fallacies in Present‐Day Education. By H. E. Buchholz. New York: The Macmillan Company, 1931. Pp. xiv + 200.

Extra‐Curricular Activities of High School Girls. By Olivia Pound. New York: A. S. Barnes & Company, 1931. Pp. viii + 97.

The School Club Program. By Harold D. Meyer. New York: A. S. Barnes & Company, 1931. Pp. x + 178.

A Study of Biology Notebook Work in New York State. By Don O. Baird. New York: Bureau of Publications, Teachers College. 1930. Pp. viii + 118.

The Class Organization and Activities. By Margaret Ann MacDonald. New York: A. S. Barnes & Company, 1931. Pp. xv + 134.

Physical Capacity Tests. By Frederick Rand Rogers. New York: A. S. Barnes & Company, 1931. Pp. viii + 50.

Making a Living. By Leverett S. Lyon. New York: Macmillan Company, 1927. Pp. xiv + 622.

The Modern Worker. By Mildred J. Wiese and Ruth Reticker. New York: The Macmillan Company, 1930. Pp. xviii + 610.

Federal Aid. By Austin F. Macdonald. New York: Thomas Y. Crowell Company, 1928. Pp. xii + 285.

Moral Education among the North American Indians. By Claude A. Nichols. New York: Bureau of Publications, Teachers College, 1930. Pp. v + 104.

Julius Rosenwald Fund Review for the Year. By Edwin R. Embree. Chicago: Julius Rosenwald Fund, 1930. Pp. 31.

Predicting the Scholastic Success of College Students. By Charles W. Odell. Urbana: University of Illinois, 1930. Pp. 43.

Mathematics in Modern Life. By The National Council of Teachers of Mathematics. New York: Bureau of Publications, Teachers College, 1931. Pp. ix + 195.

The Cosmopolitan Evening School. By John F. Friese. New York: The Century Company, 1929. Pp. xvii + 388.

Happy Times. By Sister Mary Estelle. New York: Macmillan Company, 1930.

Industrial Microscopy. By L. C. Lindsley. Richmond: William Byrd Press, Inc., 1929. Pp. xv + 286.

Textbook of Biology. By William Martin Smallwood. Philadelphia: Lea and Febiger, 1930. Pp. xvi + 469.

Elements of Accounting. By R. Emmett Taylor and Richard N. Owens. New York: The Macmillan Company, 1930. Pp. x + 518.

The Indians in Winter Camp. By Therese O. Deming. Chicago: Laidlaw Brothers, 1931. Pp. 126.

Human Learning. By Edward L. Thorndike. New York: The Century Company, 1931. Pp. 206.

Diagnostic and Remedial Teaching in Arithmetic. By Leo J. Brueckner. Philadelphia: The John C. Winston Company, Ï930. Pp. ix + 341.

Individual Arithmetic, Books One to Twelve. By Carleton Washburne and Others. Yonkers: World Book Company, 1930.

Teaching the Child to Read. By Samuel White Patterson. Garden City: Double‐day, Doran and Company, 1930. Pages xii + 524.

Vocational Civics. By Howard C. Hill. Boston: Ginn & Company, 1928. Pp. xv + 365.

Powder Puff. By Alvin M. Peterson. Milwaukee: The Bruce Publishing Company, 1930. Pages 104.     

The new books on our shelves

Evaluation and Improvement of Teaching. By Charles W. Knudsen. Doubleday Doran &; Co.

Arithmetic for Everyday Life. By Robert Anderson, Teachers College, West Chester, Pa., and Shelton Phelps, George Peabody College for Teachers. Silver, Burdett &;Co.

Problems of the Teaching Personnel. By Dennis H. Cooke. Longmans, Green &; Co.

Intelligence—Its Manifestations and Measurement. By Paul L. Boynton, 1933. D. Appleton and Company. Pp. xi + 466.

Significant Contemporary Stories. Edited by Edith R. Mirrielees. Garden City, N. Y.: Doubleday, Doran and Company, 1929. Pp. 376.

Stongs for the School Year for Junior and Senior High Schools. Compiled by George S. Dare. New York: A. S. Barnes and Company, 1931. Pp. xvi + 191.

The Psychology of School Music Teaching. By James L. Mursell and Mabelleb Glenn. New York: Silver, Burdett and Company, 1931. Pp. v + 378.

The Courts and the Public Schools. By Newton Edwards. Chicago: The University of Chicago Press, 1933. Pp. xvi + 591.

A Gestalt Completion Test. By Roy F. Street. New York City: Bureau of Publications, Teachers College, Columbia University, 1931. Pp. in + 65.

College and Reference Library Yearbook. American Library Association, Chicago: American Library Association, 1931.

Public School Finance. By Homer P. Rainey. New York: The Century Co, 1929. Pp. xix + 385. (Century education series.)

Beyond the School. By Frank A. Rexford, Cham.es M. Smith, Sarah Lansuburg Seixin, and Paul F. Frabbito. New York: Henry Holt and Company 1933. Pp. xx + 409.

The Administration of Public High Schools Through Their Personnel. By Georgs A. Rice, Clinton C. Conrad, Paul Fleming. New York: The Macmillan Company, 1933. Pp. x + 723.

Everyday Problems in Classroom Management. By Edwin J. Brown. New York: Houghton Mifflin Company, 1933. Pp. xv + 306.

Modern Solid Geometry. By John R. Clark and Arthur S. Otis. New York: World Book Company, 1932. Pp. xx + 171.

Junior Mathematics for Today—Book One. By William Betz. New York: Ginn and Company, 1933. Pp. x + 406.     

The new books on our shelves

Safeguarding the School Board's Purchase of Architects' Working Drawings. By Arthur Marcus Proctor. New York: Columbia University, 1931. Pp. iii + 138.

The Platoon School in America. By Roscoe David Case. Stanford University: Stanford University Press, 1931. Pp. vii + 283.

Business Management in School Systems of Different Sizes. By M. B. Brunstetter. New York: Columbia University, 1931. Pp. v + 135.

Vegetable Growing. By James Edward Knott. Philadelphia: Lea and Febiger, 1930. Pp. xvi + 352.

Educational Finance Studies. By Carter Alexander. New York: Bureau of Publications, Columbia University, 1931. Pp. vi + 92.

Reserve Funds in Public School Finance. By Frank C. Ketler. New York: Bureau of Publications, Teachers College, 1931. Pp. vii + 77.

Students' Guide to Modern Languages. By Wilson. New York: Isaac Pitman and Sons, 1930.

Air Travel. By James E. Mooney. New York: Charles Scribner's Sons, 1930. Pp. xvi + 311.

The Art of Learning. By Walter B. Pitkin. New York: McGraw‐Hill Book Company, 1931. Pp. v + 409.

A Study of the Ohio Compulsory Education and Child Labor Law. By Arch O. Heck. Columbus: Ohio State University, 1931. Pp. v + 210.

My Educational Guidebook. By Robert H. Rodgers and Harry S. Belman. Milwaukee: The Bruce Publishing Company, 1930. Pp. 24.     

The new books on our shelves

A New Study of English Words. By Jessie Macmillan Anderson. Cincinnati: American Book Company, 1929. Pp. 116.

Borrowing Money for the Public Schools. By Henry Rowland Halsëy. New York: Bureau of Publications, Teachers College, 1929. Pp. viii + 127.

Oral English and Debate. By Lyman M. Fort. New York: Henry Holt and Co, 1929. Pp. v + 314.

The Training of the Will. By Johann Lindworsky, S. J. (Tr. by A. Steiner and E. A. Fitzpatrick.) Milwaukee: Bruce Publishing Company, 1929. Pp. 226.

Public School Administration. Revised and Enlarged Edition. By Ellwood P. Cubberley. Boston : Houghton Mifflin Company, 1929. Pp. xxii + 710.

The Business Administration of a School System. By Ward G. Reeder. Boston: Ginn and Company, 1929. PP. x + 454.

Business Administration of Public Schools. By Harry P. Smith. Yonkers: World Book Company, 1929. Pp. xv + 432.

City School Surveys, an interpretation and appraisal. By Hollis Leland Caswell. New York: Bureau of Publications, Teachers College, Columbia University, 1929. Pp. vi + 130. Teachers College Contribution to Education No. 358.

Programs for Special Occasions. For Primary Grades. By Marion Kennedy and Katherine Isabel Bemis. New York : A. S. Barnes and Company, 1929. Pp. 104. Price, $1.50.

Certain Phases of County Educational Organization. By Edmund Lewis Tink. New York : Bureau of Publications, Teachers College, 1929. Pp. 104.

Personnel Study of Directors of Physical Education for Men in Colleges and Universities. By Harry Scott. New York: Teachers College, Columbus University, 1829. Pp 90. (Contributions to educ. No. 339)

State Banks and the Federal Reserve System. By Charles S. Tippetts. New York: D. Van Nostrand Co., Inc., 1929. Pp. viii + 393.

Mental Deficiency. (Fifth Edition) By A. F. Tredgold. New York: William Wood and Company, 1929. Pp. xvi + 535.

Problem Exercises for High School Teachers. By Douglas Waples. Chicago: The University of Chicago Press, 1928. Pp. ix + 99.

Problems in American Life. By Joseph I. Arnold. Evanston : Row, Peterson & Company, 1928. Pp. 656.

An Athletic Program for High School and College Women. By Marjorie Hillas and Marion Knighton. New York: A. S. Barnes and Company, 1929. Pp. 102.

History of the United States. (Revised Edition). By Charles A. Beard and Mary R. Beard, New York: The Macmillan Company, 1929. Pp. xiv + 680 + xxxvii.

Professional Tests of Measures of Teaching Efficiency in High School. By Charles W. Boardman. New York: Teachers College, Columbia University, 1928. Pp. 85 (Contributions to educ., No. 327).

Administrative Procedures in Curriculum Making for Public Schools. By Walter D. Cocking. New York : Teachers College, Columbia University, 1928. Pp. vi + 120. (Contributions to educ., No. 329)

A Primer of Blue‐Print Reading. By Thomas Diamond. Milwaukee : Bruce Publishing Co., 1927. Pp. 70.

School Finance and Business Management Problems. By Nickolous L. Engelhardt and Carter Alexander, New York: Teachers College, Columbia University, 1928. Pp. xv + 526.

Readings in American Citizenship. Compiled by John T. Greekah. Boston: Houghton Mifflin Company, 1928. Pp. xvi + 436.

The Use and Interpretation of Educational Tests. By Harry A. Greene and Albert N. Jorgensen. New York : Longmans, Green and Co., 1929. Pp. xxii + 389. (Longman's educ. ser.)

Consumers Uses of Arithmetic. By Alerdeen O. Bowden. New York : Teachers College, Columbia University, 1929. Pp. vi + 69. (Contributions to educ. No. 340).

Human Behavior. By Stephen S. Colvin and William C. Bagley, (2nd. Rev.) New York: The Macmillan Company, 1929. Pp. xi + 334.

The Psychology of Elementary School Subjects. By Sydney C. Garrison and Karl C. Garrison. Richmond, Va. : Johnson Pub. Co., 1929. Pp. xx + 569. (Johnson edu. series.)

The Alchemy of Light and Color. By Oliver L. Reiser. New York : W. W. Norton and Company, 1928. Pp. 78. (New Science ser.)

The Effect of Familiarity with the Examiner upon Stanford‐Binet Test Performance. By Edith Marine. New York: Teachers College, Columbia University, 1929. Pp. 42. (Contributions to educ. No. 381.)     

图书馆开架借阅模式下的图书损坏及保护

开架借阅下的图书损坏及保护是各图书馆普遍面临的一个问题.详细分析其中的根源和解决的办法,针对问题提出相应的对策,是非常重要的一项工作.     

放松一点(英文)

It is very difficult for one to avoid feeling nervous from any form of examinations, let alone the severe senior high school entrance examinations, whose results are very important. Stress from parents and teachers have been too much and irresistible. You are the person who can finally decide your fate,     

谈建立可持续发展的宜居城市

“宜居城市”是一个全新的概念，它的判别标准目前国际上尚无统一的定论．文章首先对“宜居城市”理论进行了分析，界定了“宜居城市”的概念，然后指出建立宜居城市是一个系统而长期的目标，我们只有坚持科学发展观、以人为本，才能最终建成真正意义上的宜居城市．     

机智化解"课堂尴尬"

课堂应该是自然的、和谐的、灵动的。而在实际的教学中,教师经常会面临一些意想不到的尴尬。此时教师如果机智化解,课堂就会"柳暗花明",否则就会"黯然失色"。     

Take it easy!

考试的时候会紧张,比赛的时候会紧张,还有很多情况都会让人感到紧张。教你一个放松的办法：深深地吸一口气,然后对自己说一句：“Take it easy!”     

谈巧记英语单词

英语词汇的学习是有规律可循的。学会巧记单词，主要是要弄清楚英语的构词规律和英语词义衍生转换的逻辑思维过程，培养自己根据词形判断词义及其发音，借熟词扩大词汇量的能力。记单词还有“勤”，应天天看，天天记，学了新的，还要温习旧的。英语词汇，大部分是由拉丁语和希腊语词根借助前辍和后缀派生的。     

Two easy ways to cheat

Stochastic independence is not an easy notion. Because it is part of the probability structure, it can have some surprising non‐properties, which is beneficial for teachers and students to see illustrated. Neither is the relationship to causal independence an easy one.