The Optical Magic Lantern Journal (February 1895)

18 The Optical Magic Lantern Journal and Photographic Enlarger. to themselves, and when they should appear animated they are sombre during the exposure, and when supposed to be of a sad effect a suppressed smile is often found lurking round the mouth. Until trained models are used and not any shop assistants who happens to be young or old, according to the character desired, are employed, one cannot expect to find a complete set; true, now and again a good slide is | | which produce the phenomena of light. obtained, but it is greatly a matter of chance, and until trained actors and actresses are employed for the purpose, and that, too, after rehearsals, we cannot expect to have satisfactory life models.” 3 * mM In future, Brin’s Oxygen Company intend adopting two trade marks, one for their gas, and the other for their cylinders. mS a 3s Tue City Press, of recent date, contains the following letter:—Can any of your readers inform us whether all the tradesmen of Cheapside have the right to use a ‘ limelight,” showing from any part of their premises, and to move it about as a search light ? What would . be the effect if they all exercised the right? To have a dazzling light directed up Cheapside, from end to end, seems to be calculated to In connection with experiments with glass tubes filled with phosphorescing sulphides of barium, calcium, &c., which have been exposed to sunlight and then subjected to a temperature of 100c, which during the time of their return to normal temperature exhibited phosphorescent signs, M. Raoul Pickett, of Geneva, considers that it is due to the freezing or arrest of certain molecular particles, the calorific oscillations of One of the most expensive lantern slides lately | made was manufactured by Mr. Walter Tyler. It cost him altogether about £250. Particulars can be ascertained from his letter on another page. We learn that he has made arrangements with several art publishers for the exclusive copyright of lantern slides for certain scripture subjects. Tue Lantern Bureau, which was founded by ; Mr. W. T. Stead, of the Review of Reviews, has been transferred to Mr. F. N. Haton, whose headquarters are at 29,Queen Anne’s Gate, S.W. x ws * Mussrs. TayLor, TayLor, AND Hopson have done much in this country to further standard ' Jens-screws and fittings, and have sent to the bring about accidents in the traffic and to injure the eyesight of pedestrians, besides being an | elv¢ SL ’ ' gcrew one inside the other, so that it is s simple , rbjectionable nuisance.’ Tur Princess Louise, who is considered very good at sculpture, is having photographs taken of her handiwork, with a view to making slides from the negatives. A patrxt has been taken out by My. Geo. Dickinson for a new hand camera which is being manufactured by Marion & Co. In the specifica tion he says: “I provide a suitable closed box | or camera in which a lens and shutter may be used in the ordinary way. Into tliis camera and opposite the lens is a rectangular frame, acting as a plate or film holder, having projections in its inner four corners or angles, so that American Institute a case for exhibition containing twelve adapters of varying sizes, which matter either to attach a large or small lens. A new illuminating gas, called Acetyline, has been experimented with, and it is said to be the future gas for general illumination, inasmuch as it gives a splendid light. It can be made in solid rods, which require to be merely placed in water when a supply of gasis required. It is also stated that the intensity of the new illuminant will make it of enormous value for lantern projection. A lecture on this subject was lately given at the Society of Arts by Professor Vivian B. Lewes. * Bd td i Uv tothe present, only on a few occasions has the sensitive sheets or plates, and cardboard, | or other intercepting medium, or the sensitive sheets or plates only, with or without sheaths when placed at right angles and in opposition transversely across each other, may be supported and allowed to fall at the will of the operator by revolving or raising and lowering eccentric or alternating catches working at opposite sides or corners in such a manner that, at each placed, removed, and succeeded by another. the lantern been used at the Royal Albert Hall, and at each the entire arrangement has been under the care of Messrs. Noakes and Son, of Greenwich. Those who have had dealings with this firm know that when they undertake anything they do it in a thorough and efficient manuer. Their last appearance there was on a recent date, and so well were matters carried out that until the time for showing the pictures. movement, one of the sheets or plates is dis_ there were no visible signs that the lantern was ' to be used. But then Messrs. Noakes have an