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THE NORTHERN MICROSCOPIST. 
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C. T. A.—No doubt your suggestion 
is a good one, but it would take up so 
much of our time that it would be im- 
possible to carry it out. 
C. H.—A translation of the paper 
would we fear not be of sufficient in- 
terest to our readers. 
H. P.—Pasteur’s solution is made of 
cane sugar and the ashes of yeast, and 
is no better than the artificial mixture 
of phosphates, &c. 
C, E.—Aylward’s turntable you will 
find described in this number: it isa 
useful article. 
W. B.—We hope you will approve 
the article. In this form it will be of 
use to many. 
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VEGETABLE SECTIONS. — Well- 
mounted double stained Vegetable 
Sections, in exchange for good Polariz- 
ing Objects, also well prepared. A. J., 
Doherty, 26, Leamington Street, 
Oxford Road, Manchester. 
D1aTOMS AND CRysTALs.—Will 
exchange these for well-mounted Ana- 
tomical Preparations. A. Smith, The 
Laboratory, Essex Road, London. 
MARINE ALG&.—Wanted, Marine 
Algze in fructification, in exchange for 
well-mounted slides. J. Tempere, 
Storrington, Sussex. 
CLusTER Cups.—Freshly collected 
specimens of these micro-fungi from 
the dock, sorrel, pilewort, and nettle, 
in exchange for king-fishers’ eggs, side- 
blown. G,. Garrett, 13, Burlington 
Road, Ipswich. 
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PoLtyzoa.—Named Slides of British 
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tively.—J. C. E., care of the Ep1Tor. 
BINOCULAR MICROSCOPE.—A good 
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one each B, C, and D, Selenite stage, 
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B. D., care of Editor NORTHERN 
MICROSCOPIST. 
IMMERSION OBJECTIVE.—A Splen- 
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as good as new. What offers? B., 
care of Editor NORTHERN MICROs- 
COPIST. 
