104 



The Microscope. 



of the body is composed of a cellular substance. The mode of 

 increase or propagation of these animals appears to be principally by 

 ova. Linnaeus and many other naturalists speak confidently of the 

 ova of Teniae, mentioning their shape, size, &c., but I have never seen 

 anything like ova which I could decidedly say belonged to these 

 animals, excepting some globular bodies v^hich I saw by a powerful 

 magnifying glass, in the ducts that opened into the lateral oscula 

 There is every reason to believe that Taeniae produce ova, and that 

 their ova, as well as those of other intestinal worms, are so con- 

 structed as to be very little perishable. 



Bureau of Animal Industry, Washington, D. C. 



A NEW PLANISHER. 



R. N. REYNOLDS, M. D. 



TN using the section flattener in cutting thin sections by the paraffin 

 method, we frequently need to wipe the edge of the knife, and 

 for this purpose must slide the flattener off of the knife. To save this 

 trouble I have devised the following form of flattener, which answers 

 much better than the old one : 



r~^ 



h 





A New PJanisher. 



Take two strips of thin spring brass, each about one-half inch 

 wide and one and a-half inches long ; cut them into shape A. The 

 back of the knife is next laid across the centre of the wide portion, 

 and the brass is bent up around the back of the blade, then curl the 

 narrow portion around a knitting needle, completing the clip, the 

 edge view B. Treat the other brass in the same way, fitting one 

 snugly to the shank end, the other to the opposite end of the blade. 



Heat about two inches of each end of the knitting needle, and 



