342 



CABINETS AND TRAYS FOR SPECIMENS 



[CH. X 



in Roman numerals, and the number of the first and last compart- 

 ment in the drawer in Arabic numerals (fig. 205). 



531. Trays for slides and ribbons of sections. Early in 1897 

 the writer devised the simple tray shown in fig. 206. It was designed 

 especially for the ribbons of sections in preparing embryologic series 



and for material for 

 class work. As will 

 be seen by the figure 

 the two slides are 

 alike and the tray is 

 very shallow. It was 

 soon found that the 

 wood forming the 

 bottom of the tray 

 was too rough for rib- 

 bons of sections and 

 smooth white paper 

 was put in the tray 

 before the ribbons 

 were laid upon it. 



These trays were 

 soon used for the 

 mounted prepara- 

 tions as well as for 

 the ribbons of sec- 

 tions. Theywere 

 made of a proper size 

 to fit the laboratory 

 lockers (fig. 208) and naturally came to be used for storage instead of 

 the expensive slide cabinets. For this purpose five could be put in 

 a single compartment of the locker or thirty-five in an entire locker. 

 As each tray holds fifty slides 25 x 75 mm.; thirty-five 38 x 75 mm., 

 and twenty-five slides 50 X 75 mm., the saving of space was very 

 great. 



532. Slide trays with tongue, groove, and compartments. In 

 the first trays the edges were square and sharp. These were rounded 



FIG. 205. CABINET FOR MICROSCOPE SLIDES. 



This cabinet contains 20 drawers like that shown in 

 fig. 204, and as indicated at the right there are 420 com- 

 partments for slides. 



