236 



THE AMEKICAN MONTHLY 



[December, 



ments with silver nitrate are here de- 

 scribed. The exterior lines of the 

 epithelium are stained black. In 

 connective tissue the silver salt seeks 

 the finer vessels, which are the be- 

 ginnings of the lymphatic system, 

 and is deposited there as a fine black 

 grainy precipitate. The fundamen- 

 tal tissue of the cornea stains yellow 

 or dark brown. Low powers are 

 recommended, 400 to 500. 



137. His. Ueber die Einwirkung 



des salpetersauren silber oxyds 



auf die Hornhaut. Schweitzer 



Zeitschrift f. Heilk. ii. Heft 



I, p. I (1862). 



Weak solutions of silver nitrate, 



according to His, in former essays, 



develop the inner cell-substance, 



strong solutions the outer. His now 



thinks that the time of treatment is 



important. 



The salt is first deposited in the 

 intercellular substance of the cornea 

 but is soon dissolved out by the sur- 

 rounding fluids and may enter the 

 cells to be again precipitated under 

 the influence of light or by contact 

 with peculiar compounds in the cells. 

 The method is essentially causticising 

 by silver nitrate. 



13S. V.Recklinghausen. Zur 

 Geschichte der Versilberungs- 

 methode. Arch, pathol. Anat. 

 xxvii, 419 (1863). 



139. His. Ueber das Epithel der 

 Lvmphgefasswurzeln und liber 

 die V. Recklinghausenschen 

 Saftkanalchen. Z e i t s c h r . 

 Wiss. Zool. xiii, 455. 

 Each of these authors claims pri- 

 ority in the use of silver nitrate. 

 Von Recklinghausen insists he dis- 

 covered the method as a ' new mode 

 of anatomical investigation,' but His 

 (see 134) in 1856 showed that silver 

 in the cornea diflerentiated intra and 

 extra cellular substance, and Flinzer 

 and Coccius (No. 133) made a sim- 

 ilar statement in 1854, but did not 

 carry the application any further. 

 [To be continued.^ 



EDITORIAL. 



Publisher's Notices. — All communications, re- 

 mittances, exchanges, etc., should be addressed to the 

 Editor, P. O. Box 630, Washington, D. C. 



Subscription price $1.00 PER YEAR strictly in ad- 

 vance. AH subscriptions begin with the January 

 number. 



A pink wrapper indicates that the subscription has 

 expired. 



Remittances should be made by postal notes, money 

 orders, or by money sent in registered letters. Drafts 

 should be made payable in Washington, New York, 

 Boston, or Philadelphia. 



The regular receipt of the Journal, which is issued 

 on the 15th of each month, will be an acknowledgment 

 of payment. 



The first volume, 1880, is entirely out of print. The 

 succeeding volumes will be sent by the publisher for 

 the prices given below, which are net. 



Vol. II (1881) complete, $1 50. 



Vol III (1882) complete, $2.00. 



Vol. IV (1883) complete, ^1.50. 



Vol. V (1884) complete, fi.50. 



Vol. V (1884), Nos. 2-12, 51.00. 



Vol. VI (1885), 51 00. 



— To our many subscribers and read- 

 ers whose faces are not known to us, 

 as well as to the many others whom 

 we number among our friends, we 

 extend a hearty Christmas greeting 

 and wishes for a happy New Year. 

 In a few days the whole civilized 

 world will celebrate a day that has 

 been observed for ages, and comes 

 down to our own time as a day oi 

 good cheer to rich and poor. But 

 few are so entirely wrapped up in 

 their own affairs that Christmas tide 

 does not bring out the generous im- 

 pulses of their nature. On Christ- 

 mas eve and Christmas morning there 

 is probably more genuine happiness 

 in the world than any other day of 

 the year. Christmas is therefore a 

 great blessing to the world, and we 

 trust all our readers will enjoy it 

 fully. 



o 



William B. Carpenter. — The 

 death of Dr. W. B. Carpenter, the 

 eminent English physiologist and 

 microscopist, was announced last 

 month. Dr. Carpenter has been so 

 closely associated, and intimately ac- 

 quainted, with the progress of mi- 

 croscopy in England during his long 

 career as a leader in scientific thought, 

 and so well known among micro- 

 scopists, that we have deferred an 

 extended notice of his life until Jan- 

 uary, when we shall present our 



