1897] MICROSCOPICAL JOURNAL. 25 



ferent bones are formed in the membranes which invest 

 this original McclicVs cartilage^ often however leaving 

 some remnant of the cartilage even to the very end of 

 life. Of these the deiitary is the central one bearing 

 teeth, the angularc the one bearing the articular face and 

 meeting the quadrate. 



EDITORIAL. 



Peroxide of Hydrogen. — We are very g-lad to call atten- 

 tion to the article of Mr. C. P>. Hanaman on pag-es 7, 8 and 

 9 describing- his experiments and the use made of the 

 peroxide. We trust that others will report upon the use 

 of this antiseptic. In his letter transmitting- the article 

 Mr. Hanaman writes: "Altog-ether the specimen is one 

 over which many hours of profitable study may be spent, 

 and I trust that this article may induce others to experi- 

 ment in the same direction, and if possible improve upon 

 the process. I do not think the bleaching- process can be 

 very much improved but there is ample field for experi- 

 ment in the direction of fixing fluids with penetrating- 

 power sufficient to pass quickly throug-h chitin and of selec- 

 tive staining- agents with the same powers. 



Microscope Wanted. — One of our subscribers (W. C. 

 P.), wishes to buy an instrument, — student's Van Heurch 

 preferred. Send offers marked "No. 1290" to us for his 

 consideration. 



Barbados Earth, — We have a small quantity left of the 

 supply of Barbados earth so kindly given to us, for dis- 

 tribution, by Mr. Bryce Scott of New Brunswick. Send 

 stamped envelope. 



Richard H. Oakley, 2227 Wilson avenue, Cleveland, Ohio, 

 has slides of Sycamore, double stained which he wishes to 

 exchange for slides of diatoms, ferns or mollusca odon- 

 tophora. 



