1899] 



MICROSCOPICAL JOURNAL. 



97 



all seg-mentated, the latter most rapidly. After three 

 days, it had become a typical g"astrula, the nucleated frag-- 

 ment a smaller g-astrula, and^the non-nucleated also a 

 gastrula. All the cells showed nuclei. 



Indian Corundum. — In India, it is found in connection 

 with basic and acid rocks. Particularly a felspar rock in 

 the Coimbatore district of Madras yields unaltered corun- 

 dum which shows no evidence ©f secondary orig-in. Cor- 

 undum may be crystallized out from certain slag's which 

 contain an excess of alumina. 



W^hite's Objects. — We have received a supply of the 

 following- new preparations from Walter White. Those 

 who have all the others will want these also. 

 Vine Stem. T. S. Serial Number 



Oleander 



Maple 

 Hop 

 Oat 

 Larch 

 Plane 



Andromeda floribunda " 

 Iris, Leaf 



Mexican Agave " 



Cucumber, Ova " 



Dendrobium, Aerial Root 

 Fern, Stipe T. S. 



Lady Fern " 

 Sea Buckthorn Cuticle 



Arancaria imbricata " 



Barbary '* 



Horse-chestnut, Starch 



182 

 183 

 184 

 185 

 186 

 187 

 188 

 189 

 190 

 191 

 182 

 193 

 194 

 195 

 196 

 197 

 198 

 199 



inOROSCOPICAL APPARATUS. 



A Lantern Microscope. — Hug-o Schroeder g-ave a lecture 

 and demonstration of his Electric -Microscope in London 

 Jan. 11, 1899. It is capable of a raag^nification of 10,000 

 dia. Its efficacy is due to a new lamp of semi-incandes- 

 cent type. 



