32 



PRACTICAL HISTOLOGY. 



get warm the white corpuscles, which were perhaps 

 previously rounded and inert, begin to throw out 

 processes and exhibit amoeboid movements, which 

 become more and more marked as the temperature 



Simple warming appirntus, complete, shown in operation. 



rises, so that by virtue of these an actual change of 

 place from one part of the field to another may be 

 effected. It is well in making this observation to 

 select a single corpuscle and to sketch its outline and 

 that of its more immediate surroundings at intervals 

 of half a minute. As the corpuscles become spread 

 out in creeping along the glass, one or more nuclei 

 may sometimes be seen indistinctly in them; more 



