6 UNIVERSITY OF MISSOURI STUDIES 



oughly hardened that each organ shows the impressions 

 made upon it by the adjacent organs and retains its form 

 even though it is cut into relatively thin sections. The 

 main structures in each section were identified without dis- 

 turbing the relations of the parts. 



While every part was yet in its normal position, a draw- 

 ing was made of each section by placing a thin plate of glass 

 on its upper surface and tracing the outline of the parts with 

 a fine pen and India ink. The tracing was readily trans- 

 ferred to paper by placing the sheet on the glass over the 

 drawing, holding them up to the light and retracing the out- 

 line on the paper. In making the tracings each line was 

 drawn with the eye and pen directly over the same part, thus 

 avoiding displacement on account of the thickness of the 

 glass. 



For the purpose of uniformity and in order to avoid 

 unnecessary confusion all the plates represent the sec- 

 tion as viewed from above with its posterior portion toward 

 the top of the page.' 



After the permanent outline records of the undisturbed 

 parts had been thus obtained each section was studied in 

 minute detail. Every part was followed from its beginning 

 to its end through every section in which it appears. Ves- 

 sels and other hollow structures were traced by passing a 

 bristle through the lumen. Nerves, muscles, tendons, and 

 all solid structures were traced by dissecting the connective 

 tissue away from one side of each so that they could be 

 followed through the section and definitely located in the 

 next section. 



^Jackson, C. M., Orientation of figures in topographical anatomy. 

 MEt. anzeiger, Bd. 20. 1901, s. 300. 



