THE MICROSCFPE. 155 



the superfluous turpentine, which was the cause of your former poor, 

 success. 



By following this method to the letter it will be certain to re- 

 ward any colaborers in microscopical researches and they will 

 obtain especially fine specimens by staining first in the carmine and 

 then the haematoxylin solutions. These double stained specimens 

 enable us to differentiate the individual cells, which take the 

 carmine solution up with equal intensity. As a matter, of course, 

 the specimen stained in carmine has first to be washed out and 

 hardened in alcohol, before it is subjected to the hcemotoxylin 

 solution. For instance, the neuroglia cells of the spine and brain, 

 cancer cells and other pathological products are brought 

 out with greater clearness. Objects thus stained in toto can be 

 preserved in alcohol for an unlimited time and can also be embed- 

 ded for cutting in any other manner according to the fancy of the 

 worker. 



Mr. Heneage Gibbes in the Qicarterly Jota-nal of Microscopical 

 Science^ of London, had this to say in regard to the use of the 

 Wenham Binocular with high powers. A great many plans have 

 been tried for the purpose of obtaining stereoscopic effects with 

 high powers and these have all required a special stand, or 

 special apparatus entirely removed out of the reach of the ordinary 

 working microscopist and led, I think, to the prevalent idea that 

 the binocular microscope is entirely unsuited for histological or 

 pathological research. With a yV^h oil immersion of Messrs. 

 Powell & Lealand's make, attached to a Wenham binocular 

 the .stereoscopic effect is perfect, the whole field is illumin- 

 ated and the result obtained is really wonderful. Taking a prep- 

 aration of the tadpole's tail hardened in gold solution the different 

 elements are seen in their true relations to each other; there is no 

 difficulty in deciding v/hether a fine nerve termination passes over 

 or under or into a connective tissue corpuscle. Cells are seen not 

 as flat plates, but as spheroidal bodies, with their intranuclear 

 and intracellular network pervading their whole substance. The 

 only difficulty I have found is to persuade people that the power 

 is really so high, objects stand out in such bold relief, they 

 cannot believe it possible. This, therefore, is a most important im- 

 provement. 



Mr. Heneage Gibbes in the Quarterly Journal of Microscopical 



