THE ROYAL ARTILLERY INSTITUTION. 
351 
A 4" telescope has been mounted at the Observatory. Monthly notices 
are issued notifying the Astronomical Phenomena which occur during each 
month, and Captain Drayson has frequently attended to afford information on 
the subject. The instrument is sufficiently large to show the satellites of 
Jupiter, and Saturffis rings. 
11. Photography. Pive Officers have received instruction in Photography 
since the last report. 1000 negatives have been taken during the year, from 
which over 10,000 copies have been printed. 
Two new lenses have been purchased, viz. a group lens, and a new wide 
angle lens for taking interiors and landscapes ; and a small sum has been 
expended on accessories, and in making certain additions to enable photo¬ 
graphs to be taken at either end of the room. This department of the 
Institution is now very complete, and the Committee have therefore felt 
justified in reducing the charge hitherto made for photographs, from 6s. 
to 5s. a dozen for cartes-de-visite size, and from £4s. to 18s. a dozen whole 
plate size. 
Thanks are due to Capt. John Stirling, E.A. for lending a number of 
views in New Zealand for copying, and also to Lieut. A. B. Brown, E.A. for 
some photographs of Gibraltar, thus increasing the collection of views of 
Poreign Stations. 
12. Instruments .—-Some deficiencies which existed in the excellent 
microscope, presented to the Institution by the late Sir E. Gardiner, have 
been supplied at a cost of £6, and it may now be considered complete as 
an instrument intended for general use. The articles purchased consist of a 
polarizing apparatus,—absolutely necessary, as many of the objects in the 
Cabinet are specially intended to be viewed by polarized light;—an objective 
carrier, to enable two object glasses to be conveniently used; and an 
objective §", to fill up an inconvenient gap which existed in the range of 
powers. Lt.-Col. Miller, E.A. has performed a most useful work in drawing 
up some simple instructions for using the microscope, and has also made a 
list of all the objects in the cabinet; both of which the Committee have caused 
to be printed. It has also been decided that if two or three Members at 
any home station express a wish to have the microscope on loan, it shall be 
forwarded to the care of any individual Member who is willing to take 
charge of it. The instrument is not to be retained more than one month 
at a Station. This arrangement will place the microscope within reach of 
Members who are away from Woolwich, and the Committee feel that they 
are thus carrying out one of the main objects of the Institution, by pro* 
viding facilities for intelligent occupation and study. 
13. Lectures .—In addition to the regular course of Lectures which 
have been delivered to the Advanced Class of Artillery Officers by Pro¬ 
fessor Bloxam, E.C.S., and by Dr Percy, P.E.S., those enumerated in the 
following list have been given on Wednesday Evenings during the winter, 
and the Committee desire to express their thanks to Mr Abel, The Eev. J. 
Bellew, Lt.-Col. Miller, TjTC. E.A., Mr Owen, and Col. E. Eardley-Wilmotj 
E.A., E.E.S., for the gratuitous service thus rendered. 
