The Optical Magic Lantern Journal (July 1890)

16 The Optical Magio Lantern Journal and Photographic Enlarger. ‘committee, Messrs. H. Heginbotham, G. Froggat, G. Ball, jun, H. Robinson, J. Pollard, W. Gourley ; hon. treasurer, F. Brooke ; hon. secretary, C. Dawson, 32, Fleaton-lane, ‘Stockport. Mason COLLEGE, BIRMINGHAM. —The inaugural meeting of the Photographic section was held in the College on Thursday, June 5. The president (D. Nicol) delivered the inaugural address, on ‘t Book and Newspaper Illustrations,” exhibiting very interesting illustrations ; a series of lantern slides were also shown, sent by the Birmingham Photographic Society. PHOTOGRAPHIC Soctery OF IRELAND.— The monthly excursion of this society was held on the 14th ult. to Lucan and Leixlip, under the guidance of R. H. Blakeney. The day was very favourable and brought out a number of members. The above places affurded many instances for views of river and woodland scenery. A number of plates were exposed,and, judging from the fineness of the day, some excellent and well-chosen pictures will doubtless be added to the albums of those who attended this excursion. On the 2tst June a whole day excursion to the Devil's Glen, in the county of Wicklow. under the superintendence of J. H. Hargrave, Esq. There was a large attendance, and it appears that during the day nearly a hundred plates were exposed. The day—the longest of all the year —was very favourable. A few showers, but unimportant, with their attendant clouds, varied the actinic power of the light. The glen is wild and very picturesque, in the centre of a somewhat flat and dreary country. HOLnoRN Camera CLun.—The usual meeting was held on Friday, June 6th, when about thirty members assembled to see a demonstration, and hear a few words about Alpha printing by Mr. John Howson, of the Britannia Works, Ilford, who had kindly consented to give the demonstration. In concluding, Mr. Howson said that there was not more ‘trouble in working the paper than albumenized papers. “I trust Olr operations here to-night will readily convince you, and if youtry Alpha, as I hope you will, you will find a new power placed in your hands —a dependently of daylizht, in any colour, black, sepia, red. or purpie; and any surface, ordinary, highly enamelle:t or mat. and what is also most important, the pictures obtained are a permanent as the paper on which they are printe|.”” After a hearty vote of thanks to the Britannia Company in general, and Mr. Howson in particular, with which was also offered and accepted hon. membership of ; the club, the meeting was brought to a conclusion. 10: Notes and Queries. RecetveD. —The rules and list of members of the Phuto Society. ‘this society, which has just entered upon its second year, has nearly one hundred members. Applications should be made to the hon. sec., W. Fenton Jones, F.S.5c., 6, Victoria-street, King Edward-road, Hackney. VV. Srirley. —Sketch received. We think it will answer very well, although if you attach three thin rods from the base to the upright it would be much firmer. Rods sliding inside of tubes with a pinch screw will enable the table to be readily secured in any position, I P. I. asks ifinstead of a pin to set the lime on, it would not be better ta have three small spring claws aa set the lime between them. Answer. —This style has been employed, but we think they are rather in the way, for, to be firm they must be tolerably long, and this prevents a large proportion of the lime from being utilised. A correspondent in this issue pives it as his opinion that perforations through limes (lengthways) is an advantage. , writes: ‘ What kind of instrument is the Subscriber Graphiscioptricon mentioned in last issue?" Reply. -We Hackney power of producing prints in| are unable at present to say anything further than the notice in the previous issue of this Journal. S.—(1) Both instruments are good, but perhaps No. 2 will answer your purpose best. (2) Yes. the maker can fit your lenses. (3) We are not familiar with the name. E. J. A.—We note your remarks. In future, when you have to move the gas bags during an exhibition it will be much safer to turn off the oxyzen tap. if not the hydrogen too. G. Goodwin and R. Adams.—We cannot supply the information wanted, nor do we know the conditions ; better write to office of the paper. Combustion. —We do not understand your query. call by appointment we may perhaps be able to help you. WI. Corbett (Calais).—B. a. Morgan, Pengbryn Ho, Walter-road. Swansea, would like to communicate with you respecting the subject of your letter on gas taps in last issue. G. Hf. S.—By presenting your official card at’ Brinn’s oxygen works you would probably be shown the system of compression employed, and be given every information required for your purpose. Lantern (Rye). —The single object lenses, as drawn by you, can be removed and their place supplied with achromatized lenses of the same focus. Many lanterns are thus fitted, the advantage over the ordinary portrait combinations in general use being that a much larger disc can be got at a comparatively small distance from the screen. All lantern manufacturers keep achromatic lenses in stock mounted in cells and ready to be screwed into the focussing tube, and they are usually made so that one lens can screw into the other to provide for either a long or a short focus. (2) Of course, no experienced lanternist would think of allowing cold air to play upon the condenser while it is hot. (3) In throwing images on the ceiling a simple plane mirror is sufficient. (4) There is no way by which the reds of the negatives fram colourei Pictures can be reversed ; something however may be dore by local treatment with a reducing agent, as we shall point out in the course of a few art cles on transparency making, commenced in the present number. I’. J. B. writes: “ { want to use the condensers of my biunial to throw coloured lights on the stage Jor tableaux vivants. Will you kindly say in next issue how it can be done ; also, is coloured glass or velatine best 2" Reply. — Ketter use object glass alony with condensers ; coloured velatine wil! answer, but coloured glass is better, as it obstructs less light. If only one half of the condenser is used (and this may be done without the object glass) see that the fat side is next the light. Lantern (Vidal Basin).-(1) The lens mentioned will answer the purpose ; (2) Gaudy colours are preferabie fora juvenile entertainment ; (3) This is an advertisement ; (4) Ifthe A. B. C. Guide will not supply the information you desire, get the Tourist’s Road Map of Enuland and Wales. 1s 7 170, Strand, W.C.; (5) We shall look forward to the description of your lantern. ‘ Lantern" also writes: “I notice that Mr. Tempest. in last issue, alluded to asbestos as packing. I should tike to ask about quality and mode of fixing. I shall not hesitate to give an account of my biunial when finished, but Iam at present busy with a single oil lantern in my spare time.” LD. Prustoa.—The transparency received is very quod, but the subject is one which would look better ina mat with an oval instead of a circular o ening. Nemo, —If you do not wish your name to appear you can use a vam de plume, LI. W.—Too late. If you Ta our next. 20, FALLOWFIELD'S Photographic Rememhrancer for June quarter contains a long list of bargwins which are to be dispose! of at their old address, this frin being about to move into new and commo.lious premises in Charing Crossroad, W.C,