42 CHEMICAL DISCOVERY AND INVENTION 



of oils, tars, asphalts, and paint ; a paper and textile laboratory 

 and a room set aside for the use of the Chemical Club are at this 

 end of the building. 



THE SECOND FLOOR 



Quantitative analysis and food chemistry occupy the noith end 

 of the second floor. There is a total capacity of 400 students, 

 the desks being so arranged that the space occupied by each 

 student covers three lockers. In this way each worker has an 

 abundance of room, and by dividing the students into three sets, 

 each one has a private locker. The Kjeldahl room is equipped 

 with special ventilation 1 and provides for 150 digestions and 50 

 distillations. The steam-bath is arranged in a terrace with three 

 steps in order to make the back rows more accessible. There is 

 a polariscope room and an electrolytic laboratory. 



The south end on the second floor is devoted to organic 

 chemistry. The student desks, besides the usual equipment, are 

 supplied with individual steam cones, making steam distillations 

 exceedingly simple. This also saves much gas and avoids much 

 of the risk of fire. A measurement room permits accurate con- 

 ductivity measurements in a pure atmosphere ; the instruments 

 are hung from a solid wall. A fire shower is also provided for 

 use in case a student's clothing catches fire. 



The library and reading-room occupy the centre of the east 

 front on the second floor. 



THE THIRD FLOOR 



The entire third floor, with the exception of a few rooms in 

 the north-east corner, is used by the division of inorganic 

 chemistry and qualitative analysis. There are 980 lockers for 

 individual students, two lockers under the working space of 

 each student. Special ventilation in the new laboratories is 

 provided by conduits which rise a few inches above the level of 

 the table-top. Gases are drawn downward, then through main 

 conduits to the attic, where they are discharged by suction fans 

 into a large flue. Besides gas, water, and waste, the students 

 have easy access to compressed air, suction, distilled water, 

 steam, hydrogen sulphide, and electrical circuits. 



A few rooms on this floor are at present used by the depart- 



1 The Kjeldahl process involves the use of fuming sulphuric acid. 



