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NOTICES TO CORRESPONDENTS. 
All communications should be ads 
dressed to the Editor, Mr. George E. 
Davis, Dagmar Villa, Heaton Chapel, 
Stockport ; and matter intended for 
publication must reach us not later than 
the 14th of the month. 
All communications must be accom- 
panied by the name and address of 
the writers, not necessarily for publica- 
tion, but as a guarantee of good faith. 
Cheques and money orders to be made 
payable to George E. Davis, the latter 
at the Manchester Chief Office. . 
H. C.—Your alga is the Palmella 
cruenta, and a nice clean specimen it is. 
It may be mounted in Deane’s medium. 
J. T. (Stockport). —Thereis no doubt 
but that your fungus is the Septoria 
condition of Dothidea podagraria, the 
plant itself is the Gout-weed “gofodt- 
um podagraria. 
E. H.—We shall be glad to hear 
from you upon microscopical subjects. 
A. de S. G.—Publishers of THE 
NORTHERN MiIcroscoPisT have been 
instructed to send postal numbers flat. 
EXCHANGE COLUMN FOR 
SLIDES AND RAW MATERIAL. 
Communications not exceeding 24 words 
are inserted in thiscolumn free. They must 
reach us before the 14th of each month. 
Exchangers may adopt a nom-de-plume under 
care of the Editor, but in this case all replies 
must be accompanied with a penny stamp 
for each letter to cover postage, 
MYXOTRICHUM CHARTARUM. Well 
mounted slides of the above, and also 
Lycopodium spores for other well 
mounted objects.—W. S., 7, Rowland 
Street, Trafford Road, Salford. 
SLIDES, A quantity of Microscopic 
Slides for sale, or exchange for any- 
thing useful.—P. Hague, 170, Freedom 
Road, Walkley, Sheffield. 
TYPICAL SPECIMENS of Lichens, 
mounted and properly named ; in ex- 
change for typical specimens of Mosses, 
mounted and properly named.— 
THE NORTHERN MICROSCOPIST, 
Address :—‘‘ Ravenwood,” care of 
Editor, NORTHERN MICROSCOPIST. 
SOWERBY’s HISTORY OF THE 
AQuARIUM for slides of correctly 
named Mosses.—B. C., care of Editor, 
NORTHERN MICROSCOPIST. 
SALE AND EXCHANGE COLUMN 
FOR APPARATUS, BOOKS, Ero. 
Advertisements in this column areinserted 
at the rate 4d. for each 12 words or portions 
of twelve. 
Advertisers may adopt a nom-de-plume 
under care of the Editor, but in this case all 
replies must be accompanied by a penny 
stamp for each letter, to cover postage. 
All Advertisements intended for insertion 
in this column must reach us before the 14th 
of each month. 
Morris’ ROTATING STAGE. Price 
7s. 6d., or exchange for unmounted 
mosses.—A/pha, care of Editor of THE 
NorTHERN MICROSCOPIST. 
For SALg, a half-inch objective by 
Dancer, with collar adjustments, will 
resolve P. angulatum. Price 30s., or 
will exchange for a good herbarium of 
correctly named mosses of about 120 
species. “D.”careof Editor NORTHERN 
MICROSCOPIST. 
To MuicroscopistTs.—Educational 
Series of Plant Structure, 80 varieties, 
embracing all the most beautiful forms 
of Plant-hairs, Scales, &c., prepared 
ready for mounting, Is. per dozen; 
postage extra.—W. White, Warden 
Place, Nottingham. 
HASSALL’S FRESHWATER ALG&, 
2 vols., fine copy, £4 4s.'; Sowerby’s 
English Botany, third edition, half 
morocco, £16 16s.; Seeman’s Journal 
of Botany, first series, rare, and out of 
print, 9 vols., cloth, £7 7s.; ditto, 
second series, 9 vols., in half calf, gilt, 
one vol. in numbers as_ published, 
£6 6s.; Phytologist, both series, com- 
plete, £5 5s. —Address:—F, J.Warner, 
Hyde Street, Winchester. 
Students of MINERALOGY can obtain 
specimen crystals of Ruby, Sapphire, 
Diamond, &c., at extremely moderate ~ 
prices.—F. Powell, Lapidary, Salter- 
ton Place, Egham, Surrey. 
