27 



9. OTHER MICROTOOLS. 

 A. MIGROHOOKS AND MICRODISTILLATION APPARATUS. 



Microchemioal experiments on unknown particles of microscopic dimensions are 

 described by Titus of the Eastman Kodak Company. These tests are carried out 

 principally for the purpose of identifying the unknown substances, and the 

 technique is directly comparable to that used on large quantities of material 

 in chemical laboratories. For this work Titus has devised such microscopic 

 apparatus as a microdist illation apparatus (figure 21, x) with support, con- 

 densing cell, and crucible with heating element. The assembly of this apparatus 

 and its relative size is further shown in diagrammatic section in figure 21, y. 

 The microcrucible C, is in position beneath the condensing cell GG, directly 

 under the high power lens of the microscope. Quartz microhooks for carrying 

 particles during chemical analysis are shown in figure 21, z. These are drawn 

 out by means of a hot point, 1, and successive steps in the preparation of the 

 hooks are shown pictorially in 2, 3, 4, with the completed hook at 5. Titus, 

 R.N. and Gray, H. LeB. , 1930. 



DETAIL OF MICRO DISTILLATION APPARATUS 



SUPPORT 



CONDENS\NG 

 CELL 



X 



CRUCIBLE WITH 

 HEATING ELEME*' 



n 



n 



cc ,<* 



s 



^n 



Pi* z\ 



