26 



Journal of Applied Microscopy. 



always fresh by means of ventilating 

 fans. The automatic thermoregulators 

 maintain a constant temperature of 70 

 degrees. No superfluous wood is per- 

 mitted anywhere, and a complete system 

 of water-pipes and hose stations extends 

 throughout the entire building.* 



Laboratories of Microscopy, Histology, 

 and Embryology. — The general labora- 

 tory is designed for eighteen students 

 at one time, as a larger number cannot 

 be given the desired personal attention. 

 Each student is provided with a com- 

 pound microscope having coarse and fine 

 adjustment and fitted with two eyepieces, 

 and with a low and medium-power dry, 

 and with a one-twelfth inch oil- 

 immersion o'bjective, triple revolving 

 nose-piece. Abbe condenser, and iris 

 diaphragm. This equipment is consid- 

 ered the least which should be provided 

 for microscopical work. Each student 

 also has a whole table to himself and is 

 furnished with a locker convenient to 

 his table, wherein he may keep all his 

 accessory apparatus and supplies. 



LABORATORY TABLE 



The work-table is of quartered oak 

 125 X 72 centimeters on top and seventy- 

 two centimeters high. This height has 

 been found the most convenient and 

 least liable to cause an unnatural posi- 

 tion of the body. The dimensions of the 

 top are as great as can be utilized con- 

 veniently and the space is also sufficient 

 for all the apparatus needed at one time. 



* The excellence and adaptability of the 

 Veterinary College building are in large 

 part due to the cordial sympathy of the 

 architects (Professors C. P. Osborne and 

 C. A. Martin) with the work and needs of 

 modern laboratories, and their readiness to 

 consider the suggestions of those who were 

 to use the building and its furniture. 



The seats are four-legged piano stools 

 with cane tops, thus being adjustable 

 for heig'ht and convenient for any desired 

 position. Two pieces of apparatus are 

 always to be found on the tables, a 

 small glass waste-jar, over the top of 

 which (see figure) there is a pair of con- 

 nected metal rods supporting a small 

 metal funnel. In preparing slides they 

 may be laid on the rods and irrigated, or 

 staining material placed on the object. 

 When it is desired to drain off super- 

 fluous stain or to wash the preparation, 

 the slide is stood on end in the funnel 

 until drained. The other article is the 

 eye-shade, consisting of a metal base 

 formed of a small tin dish filled with 

 lead, into which a wire bent at right 

 angles at the top is inserted. Upon the 

 bend of the wire is hung a sheet of com- 

 mon manilla paper of such a length that 

 it sliall be just above the stage of the 

 microscope. As the student sits facing 

 the light the eye-shade is placed in front 

 of the microscope and excludes the light 

 both from his eyes and from the upper 

 surface of the object. 



The lockers, like all of the woodwork 

 in the laboratorv, are of quartered oak. 

 Each is provided with a combination 

 lock, the combination of which is known 

 to the student to whom it is assigned 

 and the laboratory director, only. The 

 lockers themselves contain no fixtures 

 whatever, being provided with six pairs 

 of slides. The laboratory owns a large 

 number of reagent boards and drawers, 

 all of which are exactly the same size 

 and of the proper width to fit into the 

 lockers. Each student is provided with 

 as many of these reagent boards or 

 drawers as his work requires, and all 

 reagent bottles, glassware, accessory 

 apparatus, material, etc., are always to 

 be kept on the boards or in the drawers. 

 It will thus be seen that as all boards 

 and drawers are perfectly interchange- 

 able, there can never be any confusion 

 resulting from changing the boards from 

 one locker to the other, as is certain to 

 occur sooner or later, and no care need 

 be exercised to prevent such inter- 

 changing. The reagent boards are of light 

 pine one and seven-eighth inches thick 

 and have on one side depressions in 

 which the bottles or dishes containing 

 reagents, specimens, etc., are set. When 

 a tray only is desired the reagent board 

 is simply reversed and the bottom used 

 for the purpose. The exact construction 

 of the lockers and reagent boards and 

 drawers is shown in the accompanying 

 figures, which are drawn to scale. 



Each microscope owned by the labora- 

 tory has a separate locker with combi- 

 nation lock. The microscope lockers 

 are all contained in a large cabinet 

 (See Fig.), which in turn has heavy doors 



