14 



STUDIES ON PATHOLOGIC OVA. 



TABLE 1. Showiny gradual growth of collection. 



to the collection of each 100 specimens, of which number 8 (or about 13 per cent) 

 resided in hospitals. The last column of the table shows the territorial source 

 of each century, representing an average of 18 States from which material has been 

 drawn. Upon comparing columns 2 and 3, it becomes apparent that by far the 

 largest portion of the collection has come from physicians in private practice. Yet 

 nearly all of our perfect specimens were obtained from hospitals. This is easily 

 understood when one considers that only when the operator is near can perfectly 

 fresh embryos be secured. In several instances these have been brought to the 

 laboratory still living. 



Table 2 gives a list of the contributing hospitals, with the number of specimens 

 from each. As would be expected, the majority of the specimens came from 

 hospitals located in Baltimore; second in order is New York, and third Manila, 

 Philippine Islands. Naturally, the Johns Hopkins Hospital contributes the largest 

 number, for its work is intimately related to our own and the members of its staff 

 frequently are interested in embryological studies, both in this laboratory and in 

 the clinical laboratories of the hospital. Hence we receive all of the embryological 

 specimens found at operation. 



Attention is called to the large number of specimens emanating from a single 

 hospital in Manila. This is due to the fact that this hospital numbers among 

 its staff several graduates from the Johns Hopkins Medical School, and these 

 have responded loyally to our request for Filipino embryos for a study of racial 

 embryology. 



