7O THE NORTHERN MICROSCOPIST. 
and this together with a penny stamp for the subsequent postage 
of each letter must be enclosed in an envelope and addressed to 
the Editor. We cannot undertake to forward or return letters 
except on these terms. 
THE AMERICAN MoNnTHLY MIcROoScoPICAL JOURNAL.—The 
January issue of this Journal is full of interesting matter. The 
detection of adulteration in coffee—Infusoria on leaves—Mounting 
with glycerine jelly—Cells, their growth and functions.—A very 
practical article on The preparation and mounting of micro- 
scopical objects. A note on the resolution of A. Pellucida, and 
studies of atmospheric dust. These articles, together with many 
paragraphs of interest, as well as the proceedings of about half-a- 
dozen societies, should make the journal interesting to English 
microscopists. The subscription is low, and copies may be easily 
obtained in this country from 4, Lord Street, Liverpool. 
HvuLME FietD NATuRALIsTs.—At the meeting of this society, 
held in St. Michael’s School, February 8th, Mr. J. D. Haigh, of 
the Manchester Microscopical Society, read a paper on Pollen and 
Pollen granules, their shapes and uses. ‘The general rule amongst 
flowers was cross pollination, and selfpollination was the excep- 
tion. Mr. Haigh described by means of diagrams the effects of 
different pollen on one stigma, and gave the opinions of different 
authors as to the manner in which it was carried about, exhibiting 
about thirty kinds of pollen under the microscope. 
ANGULAR APERTURES AGAIN.—Pages 154-172 of the February 
number of the Journal of the Royal Microscopical Society are 
taken up with a paper by Mr. Shadbolt, on “The Apertures of 
Microscope Objectives” and the discussion thereon. Upon its 
perusal we are bound to confess that this dissertation does not 
seem to be of much practical utility. Turn-tables, and not 
*‘ apertures ” seem to be Mr. Shadbolt’s for¢e. 
RoyaL BOTANICAL AND HORTICULTURAL SociETy OF MANn- 
CHESTER.—A series of lectures on botany will be delivered in the 
above society’s gardens at’ Old Trafford, by Mr. Leo H. Grindon, 
every Monday afternoon, during the months of May, June, and 
July. The members of subscribers’ families will have free ad- 
mission to these meetings, which are sure to be a source of pleasure 
and instruction to those who attend them. 
WATER SuppLy.—Dr. Frankland reports that the Thames waters 
supplied during the month of January, except that distributed by the 
Chelsea Company, were all efficiently filtered before delivery. The 
