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“ Summer Rambles,” was next visited. The entire circumference of the trunk of this famous oak is, at one yard above the ground, fifty feet. The inside of the trunk, however, is totally decayed, and the space utilized for the storage of farming implements ; but the upper branches are loaded with a wealth of foliage. A large number of plates, from many points of view, were exposed on this interesting object, and, the light being favourable, no doubt many good negatives would be the result. Other plates were . shied ” at the picturesque wayside cottages, and gardens gay with roses. The fine old hall, an Elizabethan structure in the half-timbered style, was sighted at a distance to the right; but the day being somewhat advanced, and the prospective manipulation of “ ham and egg ” plates having by this time begun to engage attention, it was deemed advisable to push on. After a further run of two miles the party alighted at Oawsworth—charming Gawsworth! For who that, for the first time in his life, has seen the place in all its summer beauty, could fail to be struck with admiration and delight? Near to the church, and in a shady plantation by the roadside, may be seen the unusual spectacle of a tombstone on which are set forth, in a spirited poem, the reasons why Samuel Johnson, otherwise “ Lord Flame ”—poet, wit, and play-actor—did, about one hundred years ago, elect to have his remains deposited in this secluded place. About an hour was spent in photo graphing the fine old church, rectory, old hall, and several groups of fine trees. The members then withdrew to the quiet hostelry, once a famous posting house on the London-road, but whose glory has long since departed with the good old coaching days. An excellent and substantial tea was served up, to which the party, with appetites sharpened with the breezy drive and several hours’ fasting, did ample justice. On the return journey to Macclesfield and Manchester, both ladies and gentlemen were unanimous in their opinions that the trip had been the most successful and enjoyable of any previous ones that could be remembered. Manufacturers of dry plates will surely rejoice to hear that in the aggregate more than 100 plates were exposed. Loxdon and Provincial PHOTOGRAPHIC Association. At the meeting held on the 12th inst., Mr. A. Haddon in the chair, Mr. HKNDERSON, referring to a question asked at the previous meeting, as to whether collodion or gelatine was best for repro ducing a negative, and when Mr. Hart and himself both spoke in favour of collodion, passed round a gelatine negative of the Thames at London Bridge. It was taken on a very rapid plate ; but there was little or no detail visible under the arch of the bridge. He also showed a collodion transparency from the nega tive in which the courses of stone in the arch could easily be traced, and which contained a much greater amount of detail than the negative. The developer he used was 24 grains of iron to 1 ounce of water saturated with alum, and Beaufoy's acetic acid added. Mr. W. Coles said he had noticed that if a gelatine negative was left for a considerable time in the hypo (say all night) the image was dissolved out. Mr. Henderson exhibited, on behalf of a Birmingham photo grapher, prints from a negative coated with emulsion prepared by Mr. Henderson’s formula slightly modified. The picture was taken with a lens of 22 inches focus, and stop 2 inch, as quick as cap could be taken on and off, when commercial plates, said to be of greatest rapidity, were much under-exposed with a longer exposure. In a discussion which followed, Mr. Henderson said he could take the cap on and off three times in a second. Mr. Hart said Mr. Warnerke had told him it could be done in one-third of a second. Uulk in the Studin. PHOTOGRAPHIC Society of Great Britain.—The next meeting will beheld on Tuesdaynext, July 24th,at eight o’clock, at the Gallery, 5a, Pall Mall East. South London Photographic Society.—The first out-door meeting of the season will be held at Hampstead, on Saturday, 28th inst. Tea will be provided at the “Bull and Bush” Hotel, at six o’clock. The Future or Electric Lighting for Domestic Purposes —Mr. W. K, Burton, who is well known to our readers, delivered a discourse on this subject to the members of the Sanitary Pro tection Association, on the occasion of their recent gathering at Kensington. After reviewing the gradual development of elec trical science, the lecturer pointed out that the main value of incandescent lighting, viewed purely through a sanitary point of view, rests in the circumstance that no vitiation of the atmos phere takes place, a point upon which we insisted when treating of the electric light in the dark-room. The British Association meetings in Montreal, in August, 1884, are looked forward to with great interest. The arrangements are already nearly completed. They comprise a fortnight’s tour from Montreal to the Rocky Mountains, returning by Chicago and Niagara. Parker v. the First Avenue Hotel Company, Limited.—• This was an appeal in the Supreme Court of Judicature Court of Appeal, before the Master of the Rolls and Lords Justices Cotton and Bowen, from a judgment of Mr. Justice North at the trial in Middlesex by the plaintiff, who sought to have it declared that the plaintiff Company should not be allowed to erect on a part of their building a sloped roof at an angle of 45 deg., and in such a way as would interfere with his ancient lights. The plaintiff was a photographer in High Holborn, and his studio was close to the hotel of the defendants, and it was alleged that the new building was being carried to such a height as would interfere with his ancient lights, so as to prevent him carrying on his business as heretofore. The contention of the defendants was, that while these were ancient lights, yet, if the sloped roof was at an angle of 45 deg., it could not be considered as likely to interfere with the lights to his rooms, and this angle had been held to be quite enough in similar cases. The plaintiff considered that this obstruction would seriously damage his premises, and asked that the order of the Court below be varied, so as to give him an absolute prohibition against the obstruction complaimed of by him. When the case was heard on motion, the defendants were put under certain obligations as to the building. Lord Justice Cotton delivered judgment, and went minutely over the facts of the case, observing that it was a mis take to suppose that, when a sloping roof on defendant’s pre mises gave an angle of 45 degs. to those of the plaintiff, who possessed ancient lights, that it could be considered that was quite enough, and no obstruction then existed. The order would be so varied as not to permit of any obstruction of the plaintiff’s ancient lights.—Daily Chronicle. Cause of the Acid Reaction exhibited by some kinds of Paper.—By Haebling {Dinql. Polyt. J., 247, 382).—The author rejects Feichtiuger’s statement {ibid., 247, 218) that all papers sized with resin contain free sulphuric acid, as the method used for sizing does not admit of the presence of free sulphuric acid in paper. The method consists in adding resin-soap, prepared by dissolving resin in soda-ley, to the paper pulp, and precipitating with normal aluminium sulphate, so that the precipitate of alumina in combination with resin forms the size. In the presence of free acid, resin only would be precipitated, and the paper not sized, but merely impregnated with resin particles, which would render it useless for wiiting or printing purposes. Feichtinger’s admits the presence of aluminium sulphate, but appears unable to prove, without further in vestigation, whether the sulphate exists in paper as normal or basic salt. The author mentions that this question is answered by the above method, for when normal aluminium sulphate is precipitated with an excess of sodium hydroxide, a basic precipitate must be formed. Moreover, the assumption of the simultaneous presence of free sulphuric acid and basic aluminium salt contradicts the laws of chemistry.—D. B. Photographic Club.—At the next meeting of the Club, July 25th, the subject for discussion will be “ On Toning Silver Prints.” 00 Sormpoa&ents. *,* We cannot undertake to return rejected communications. Frederic Samuels.—Such investigations, although undertaken with the immediate object of satisfying the innate desire to possess knowledge, have led to the most astounding industrial results ; and we fail to see that any useful end would be fulfilled by doing as you suggest.