Journal of Applied Microscopy. 



27 



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PLANS 

 RCAGENT 50AKD5 



rcageht boards ahd vpjw/^lr'b are 

 interchamgeable: throughout. 



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tLtVATIOh. V 



LOCKtRS IM LAB0RATOR11Z5. 



with safety locks. One or two students, 

 as the case may be, are assigned to 

 use one microscope, and to them only is 

 given the combination of the lock secur- 

 ing the instrument. In this way the 

 responsibility for breakage or careless 

 usage is definitely limited to one or at 

 most two students. The director of the 

 laboratory has further control of the 

 microscopes, in that when the working 

 hours have elapsed the doors of the 

 cabinet may be closed and no one may 

 remove an instrument without proper 

 authority. This system is a valuable 

 one, not only as preserving the micro- 

 scopes properly, but in impressing the 

 student with the fact that he is using 

 delicate and valuable apparatus which 

 must be properly cared for in order to 

 yield good results. 



In order to keep 'the laboratory equip- 

 ment intact and to still further impress 

 the responsibility of the work upon the 

 students, all apparatus used is charged 

 against the user, and loss and breakage 

 is deducted from a deposit made at the 

 beginning of the work. The system is 

 used in all the biological laboratories. 



The sink, shelves of reference books, 

 and chemicals are centrally placed so 



as to be equally accessible from all 

 parts of the room. The chemical shelves 

 are arranged on either side of a niche 

 containing a small balance, so that the 

 s-tudent may select and measure out ai 

 once the exact amount of material 

 required, and that it shall be done at 

 that one place only. At the lower end 

 of the room (at P. T.) a special table 

 supports a large paraffin bath, containing 

 twenty-four separate drawers, one for 

 each student. This bath is kept running 

 at a constant temperature, the students 

 not being required to attend to it. One 

 table (B. T.) is provided with Bunsen 

 burners and supports for heating dishes, 

 also the paraffin cans. All processes 

 which require heat are done here only. 

 The microtomes are placed on a separate 

 table (M. T.) and all sectioning must 

 be done here. It is found convenient to 

 have three unoccupied tables in the 

 space between lockers and tables, upon 

 which a tray, book, microscope, or other 

 object may be placed, as while opening 

 a locker or for a short time only. 



There is a complete photographic labor- 

 atory which may be used from either of 

 the general laboratories on the floor and 

 which contaJns all the necessary appa- 



