CORRESPONDENCE. 193 



Captain Lang's liappy discovery ? If not, can you assist in carrying 

 this out ? 



. It is strange that microscopists should not generally show a 

 greater readiness to assist each other than we usually find. I met 

 with a singular case of want of courtesy a short time ago. The Presi- 

 dent of a Microscopical Society having informed me that fine speci- 

 mens of foreign diatoms were to be found among the Californian shell- 

 washings, which shells were bought by the dealers in Liverpool, who 

 sold the washings, but that he could not give me the adch-ess of a 

 dealer, I wrote to the Secretary of the Liverpool Microscopical 

 Society, asking for the information, and enclosing a stamped envelope 

 for reply. My letter never came back to me, so I presume it was 

 delivered ; but I have never been favoured with a reply. If any of 

 your readers could furnish the information, in a letter addressed to 

 Captain Knight, Claremont Villa, Leamington, I would gladly pay 

 the postage. 



Yours faithfully, 



E. D. Knight. 



A Fraudulent Collection of Subscriptions. 



To the Editor of the ' Monthly Microscopical Journal.^ 



KOYAL MiCKOSCOPICAL SOCIETY, KiNG's COLLEGE, March 20. 



Dear Sir, — It has just come to my knowledge that some one has 

 been sending out the collecting cards of our late collector, Charles 

 Low, and is endeavouring to obtain subscriptions by this means. 



Will you allow me to caution and inform our Fellows that no one 

 is authorized to collect subscriptions for this Society besides the Trea- 

 surer and myself, and that receipts are not valid unless signed by either 

 of us. 



I am, Sir, yours truly, 



Walter W. Eeeves, 



Assistant-Secretary. 



Errata: The Figures of Crystals with Silica. 



To the Editor of the ' Monthly Microscopical Journal.^ 



AsHDowN Cottage, Forest Kow, Sussex, 

 March 6, 1871. 



Sir, — An unlucky accident delayed my receiving and returning 

 proofs of Plates LXXVII. and LXXVIH. in March number of the 

 Journal, and led to the omission of correct numbers referring to the 

 paper. 



If your readers will begin with Plate LXXVIII., and number the 

 figures in horizontal lines from 1 to 6, and in Plate LXXVII. from 7 

 to 13, they will find descriptions and figures coincide. 



I am, &c., 



Henry J. Slack. 



