158 



NOTES AND QUEKIES. 



[No. 198. 



It describes a method of printing from glass 

 negatives, but there being no cut renders the 

 meaning somewhat obscure. 



In the last number of the Photographic Journal 

 (21st ult.), some mention is made of this letter. 

 They say it proves to be one already long 

 in use, Mr. Kilburn having practised it for four 

 years. I am very desirous of obtaining more 

 information about it. I want to know the length 

 of the box or camera required ; and also the focus 

 of the lens, and the best size. Probably Mr. Kil- 

 burn or Sir W. Herschel would one of them be 

 so kind as to say. W. M. F. 



What kind of lens should be used for taking en- 

 larged copies of glass negatives according to Mr. 

 Stewart's plan? and will the same lens also dimi- 

 nish the picture ? Will not the usual camera lens 

 act ? Ply. 



[The usual compound lens is all that is required.] 



Would you have the goodness to explain, in 

 some detail, the two methods by which Mr. 

 Stewart and Mr. Kilburn multiply photographs 

 in a reduced or magnified size; the one by re- 

 flected light, the other by transmitted. Mr. 

 Stewart's experiments are upon glass, Mr. Kil- 

 burn's on cameras and daguerreotypes. I have 

 never seen any description of this latter process, 

 or of the method of preparing the stereoscope ob- 

 jects : vide Athenoeum, July 30, 1853. 



I observe with great pleasure that the cost of 

 apparatus is becoming less, &c. Amateur. 



[However much we may agree in the views ex- 

 pressed in the latter part of An Amateur's letter, we 

 have been obliged to omit it, as it violates our rule of 

 not opening the columns of " N. & Q." to the recom- 

 mendation of any particular manufacturer.] 



Is it davgerous to use the Ammonio- Nitrate of 

 Silver? (Vol. viii., p. 134.). — No: it is now 

 generally used as the best of marking inks, tvithoui 

 preparation ; and we have never yet heard of an 

 explosion from its use. Mr. Delamotte has evi- 

 dently confounded this preparation with the chlo- 

 ride of silver precipitated with strong ammonia, 

 ■which, when dried, forms the article known as 

 fulminating silver; or by adding to the oxide of 

 silver lime-water, and afterwards a strong solution 

 of ammonia, a black powder is thrown down, which, 

 ■when dried, is known as Be?-thoUefs fulminating 

 silver. Tliere is also one other, formed by adding 

 chloric acid to oxide of silver ; after drying this, 

 and then adding potassa to a solution of it, the 

 precipitate, by again being dried, becomes an ex- 

 plosive compound. 



The photographer forms a weak solution for his 

 purpose with one of the least soluble and weakest 

 of the ammoniacal preparations, and which, by 

 drying around the stopper of the bottle, is very un- 



likely to become explosive, from its wanting the 

 addition of another element as necessary to the 

 formation of an explosive compound. For my 

 own part, I must say, that I have found, from ex- 

 perience, all the compound solutions of silver keep 

 much better, and the photogenic effect more 

 satisfactory, by mixing only so much as I may 

 require for immediate use, at this time of the year 

 especially. J. H. 



iXcfUicS to jHtnar eauerftS. 



Burke's Marriage. — I am obliged to Mr. Gan- 

 TiLLON (Vol. viii., p. 134.), but the authority re- 

 ferred to does not answer my questions (Vol. vii., 

 p. 382.) : When and ivhere was Burke married ? 

 There is no doubt as to who he married. But 

 some biographers say the ceremony took place in 

 1766, others in 1767. Some leave it to be inferred 

 that he was married at Bath, others in London. 



B. E. B. 



Stars and Flowers (Vol. iv., p. 22. ; Vol. vii., 

 pp. lol. .S41. 513.). — To the piissages quoted from 

 Cowley, Longfellow, Hood, Moir, and Darwin, 

 may be added the following ingenious application 

 of this metaphorical language: — 



" Alas for life ! — but we will on with those 

 Who have an age beyond their being's day. 

 Mount with our Newton where Light ever flows; 

 See him unveil its marvels — and display 

 The hidden ricliness of a single ray ! 

 Unfold its latent hues like blossoms slied, 

 Or flowers of air, outshining flowers of May ! 

 A luminous wreath in rainbow beauty spread, 

 The noblest Fame could leave round starry Newton's 

 head." 



The Mind, and other Poems, by Charles Swain, p. 64. 



BiBLIOTHECAR. ClIETHAM. 



Odour from the Rainbow (Vol. iii., pp. 224. 310.). 

 — This idea has been traced to Bacon's Si/lva, 

 Browne's Britannia's Pastorals, Snow's Miscella- 

 neous Poems, and to a Greek writer referred to by 

 Coleridge. Georgius de Rhodes, in his Peripatetic 

 Philosophy, mentions the same effect of the rain- 

 bow, and quotes Pliny : 



" Dico sexto, iridis efFectus duos prascipue numerari. 

 Primus est, quod plantas, arbores, frutices, qnibus iii- 

 cubuerit, efficit odorationes. Tradunt, inquit Piinius 

 lib. xii. c. i'4., in quocunque frutice incurvetur crelestis 

 arcus, eandem quae sit aspalato suavitatem odoris ex- 

 istere ; aspalato autem inenarrabilem quandam. Terra 

 etiam ipsa suavius halare dicitur." 



In the annotations on Pliny, in loco, Aristotle is 

 referred to in Problem. Quccst. xii. 



BiBLIOTHECAR. ChETHAM. 



Judges styled Reverend (Vol.iv., pp. 151.198.). — 

 The following is an extract from the title of a 

 small octavo volume, printed for the assignees of 



