Monthly Microscopican / 1 iV7 \ 



J ournal, March 1, 1870.J V ■'-'-'• J 



COEKESPONDENCE. 



PONCEANE OR AnILINE EeD, AS A SUBSTITUTE FOR CarMINE IN 



Microscopic Colouring. 



To the Editor of the ^Monthly Microscopical Journal.^ 



Sib, — This substance, whicli is one of the Aniline series of dyes, 

 produces, when naixed with warm water (about five grains to a pint), 

 a most admirable colouring medium for microscopic investigations. 

 From the experience I have had of its properties, it seems likely to 

 be useful as a means of distinguishing between separate structures, 

 uniting with some but leaving others coloured as before. Epithelial 

 starch granular matter, us of brain and other animal matters, is 

 coloured by it in various shades. The Soredial tubes of Chlorococcus 

 are coloured, while the Gonidia remain green. It seems to possess 

 the valuable property of not arresting the vitality of organisms, such 

 as Vibrio or Monas. 



Metcalfe Johnson. 



PROCEEDINGS OF SOCIETIES.* 



EoYAL Microscopical Society. 



King's College, Fehncary 9, 1870. 



Eev. J. B. Reade, M.A., F.R.S., in the chair. 



The minutes of the last meeting were read and confirmed. 



A list of donations to the Society was also read, and a vote of 

 thanks passed to the resjiective donors. 



The President then delivered his Address, in which he announced 

 his intention of j)resenting to the Society his copy of the ' Philo- 

 sophical Transactions :' sixty volumes, in extenso, from 1665 to 1812, 

 and twelve volumes of 'Transactions abridged,' from 1665 to 1750, are 

 whole or half-bound. The parts from 1813 to the present time are in 

 boards, as issued by the Royal Society. The President stated that a 

 few parts, borrowed or otherwise missing, will be rej)laced. 



After reading the obituary list for the past year, the President 

 paused in his Address, fur the purpose of communicating to the So- 



* Secretaries of Societies -will greatly oblige ns by writing? tlieir reports legibly 

 — especially by printing the technical terms thus : H y d r a— and by " unJorlining " 

 words, such as specific names, which must be printed in italics. They will thus 

 ensure accuracy and enhance the value of their proceedings. — Ed. M. M. J. 



