700 



SCIENCE 



[N. S. Vol. XXX. No. 777 



plan for laboratory work is to assign three 

 students, each of a different section, to every 

 desk, one locker being provided for every per- 

 son. The laboratory sections vary in size 

 from 80 to 110 students, and it thus becomes 

 apparent at once that assignment of lockers 

 on the above basis becomes increasingly diffi- 

 cult as the total number of students ap- 

 proaches the total number of lockers. This 

 phase of laboratory administration together 

 with that arising from the registration of 

 students during the academic year; unavoid- 

 able transfers in sections due to change of 

 daily schedule ; students withdrawing from the 



given; the Monday and Tuesday afternoon 

 laboratory division (lockers 1, 4, 7, 10, 13, etc.) 

 are all indicated by yellow pegs ; Thursday and 

 Friday afternoon division (lockers 2, 5, 8, 11, 

 14, etc.) by red pegs; Wednesday and Satur- 

 day division (lockers 3, 6, 9, 12, etc.) by white 

 pegs, other sections by other colors. After all 

 the students have been assigned lockers, a 

 record of the same is made on numerically 

 tabbed index cards and thus a complete record 

 of both laboratories is kept in the office of this 

 division of the department of chemistry. A 

 glance at the details of the diagram shows 

 that each board can be folded without the 



JI 



-H-H- 



mr ifm 



-!^^^ 



T 



TOP 



VIEW OF BOARD -OPEN 



9 8 7 6 5-4 



70 71 72 73 74 75 75 77 78 ? 



END VIEW OF BOARD- CLOSED 

 university; rearrangement of students in order 

 to economize the time of the teaching force; 

 these with others that readily suggest them- 

 selves have been questions demanding quick 

 and efficient solution. In order to meet these 

 situations successfully and with the greatest 

 economy in time, the following device has been 

 prepared. Two key-boards have been con- 

 structed, each being a model of the general 

 desk arrangement of the laboratories (see de- 

 sign for details). In the numbered holes are 

 placed steel dowel pins, painted in various 

 colors. To illustrate better the general assign- 

 ment above mentioned and the use of the 

 board for these purposes, an actual case is 



DIAGRAM OF DESK 

 SHOWING NUMBERS 



least danger of the pins becoming displaced. 

 By means of an alphabetical card index (5" X 

 4"), used in conjunction with the above, there 

 is kept always at hand such data in reference 

 to the student as name, college, locker number, 

 number of course, test grades, laboratory 

 grades, quiz grades, final grades, term stand- 

 ing, laboratory section, quiz section, lecture 

 section, etc. One further example of this sys- 

 tem will illustrate its use; notice is received 

 by the department of chemistry from the 

 registrar that John Smith has withdrawn from 

 the university. On receipt of the same, the 

 alphabetical index is consulted for locker num- 

 ber of the student, say number 12. The with- 



