92 



NOTES AND QUERIES. 



[Aug. 4. 1855. 



possible to obtain sheets of paper which, when exposed to 

 the action of light, would show different colours, more or 

 less varied, according to the nature of the salt and the 

 intensity of the light. 



It did not appear to M. Testud de Beauregard that a 

 necessary relation should exist between the action of each 

 coloured raj', and the production of the particular colour 

 by that ray. It was only necessary to obtain on the 

 same paper colours whose difference was due to the nature 

 of the salt acted upon by white light, having regard at the 

 same time to the modification resulting from the intensity 

 of the action of the light. 



M. de Beauregard's process does not consist in apply- 

 ing the colours as it is done in dyeing ; but, except the 

 fixing and final development of the picture, the coloration 

 is produced by a single impression of light. 



M. de Beauregard's first idea was to investigate the 

 means of producing photographic pictures at a low cost, 

 and with this view he endeavoured to substitute other 

 substances for the salts of silver. He first tried ferri- 

 cyanide of potassium (red prussiate of potash). This it 

 is which, when a nearly-concentrated solution is em- 

 ployed, gives to the pictures the uniformly blue tone 

 seen in the picture exhibited. It affords aconsiderable 

 range of tones, from the lightest to the deepest, according 

 to the duration of the action of the light. 



The paper is prepared by floating it for a few minutes 

 on the bath, and allowing it to dry. When it is suffi- 

 ciently impressed by the light passing through the collo- 

 dionized plate to be printed, it is fixed by immersing it 

 for some time in pure water, and afterwards plunging it 

 into a rather concentrated solution of alum, which inten- 

 sifies the picture in a remarkable manner. The proof 

 thus treated is unalterable by light. The yellow colour 

 is obtained by impregnating the paper with a solution of 

 bichromate of potash. A prolonged exposure to the light 

 causes this colour to pass to green. The image is fixed 

 by washing it in common water, and then immersing it 

 in a solution of alum. 



Bichromate of potash can be employed to produce a 

 black tone, which may be carried to a very considerable 

 intensity, without any salt of silver being employed. The 

 mode of treatment is as follows : after removal from the 

 pressure frame, the paper is plunged for a few minutes 

 into pure water, and then passed into a solution of proto- 

 sulphate of iron. It is then washed a second time, which 

 causes it to lose nearly all trace of the picture. But on 

 immersing it in a bath of gallic acid, the picture developes 

 and becomes of a blue black, the intensity of which may 

 be increased by employing a solution of logwood. A 

 saturated solution of bichromate of potash is used, and 

 the paper soaked in it, and dried in the dark. Two 

 seconds' exposure in the pressure frame is sufficient ; if it 

 is exposed too long the picture becomes grey. 



The process by which M. de Beauregard obtains a 

 varietj' of colour bj' a single exposure to the light in the 

 pressure frame consists in impregnating the paper suc- 

 cessively with two mixtures, taking care to dry the paper 

 after the employment of each mixture. The first is com- 

 posed of a solution of permanganate of potash with the 

 addition of tincture of litmus. The second consists of 

 ferricyanide of potassium acidulated with sulphuric acid. 



The paper thus prepared is floated on a bath of nitrate 

 of silver. When the picture has appeared, first wash the 

 paper with pure water ; then immerse it in a weak bath 

 of hyposulphite of soda ; and lastly, after a second wash- 

 ing, the colours are strengthened in a bath of neutral 

 gallate of ammonia. 



M. Testud de Beauregard's theory is, that the different 

 rays of light act upon the collodionized glass (he has not 

 yet experimented on paper negatives) according to their 



No. 3ai.] 



colour, so as to produce different degrees of opacity, and 

 that these are precisely analogous to the relative in- 

 tensity of light proper to produce, by his process, the 

 corresponding natural colours. 



ISit^lieS ta Minor ^Lutviti. 



"Annval Register" (Vol. xii., p. 62.). — Years 

 ago I was Informed by the late Mr. Joseph Parker 

 of Oxford, who was a very early friend of the late, 

 and I regret to say the last, Archbishop of Cashel, 

 that the historical chapters of the Annual Register 

 were for some time written by Dr. then Mr. Lau- 

 rence, at that period resident on a curacy or small 

 benefice in the country, not far from Faringdon in 

 Berkshire. And I have some recollection of his 

 saying that Richard Laurence succeeded his 

 brother Dr. French Laurence, the friend and ex- 

 ecutor of Burke, in that department of Dodsley's 

 valuable periodical. I trouble you with thi^;j 

 notice in the hope that it may meet the eye of a,l^ 

 near relative of the archbishop, who is far more 

 able to impart information ou this subject than 

 myself. Philip Bliss. 



Relic of Wolfe (Vol. xii., p. 7.). — Observing a 

 Note under this head from J. O., and lamenting 

 on the loss of the " Conference," perhaps he and 

 the majority of your readers may not be aware of 

 the well-being of a much more remarkable vessel 

 than the above, viz. In the good old barque "Wil- 

 liam and Ann," built in London in the year 1759 ! 

 which ship actimlly conveyed General Wolfe at the 

 time of the siege of Quebec, and as a proof of her 

 good standing may be found as sustaining her 

 character by appearing now classed in Lloyd's 

 register book as ^ 1 (second class), and yet almost 

 a century old, and is thirty-seven years older than 

 the old Tyne brig which has lately finished her 

 distinguished career. Nauticus. 



Goring, Lord Goring (Vol. xi., p. 487.). — The 

 existence of a connexion between the noble house 

 of Goring and the family of Goring of Kingston, 

 in the county of Stafford, has probably been sup- 

 posed from the fact of Henry (roring of Kingston, 

 who died 1642, being stated In the Visitation of 

 the county of Stafford, a. d. 1664, to have been 

 son of Henry Goring of Horsham, in the county 

 of Sussex, in which county the Gorings were lo- 

 cated at Burton and Ovingdeene, and held con- 

 siderable estates. No proof of any connexion was 

 shown at the time of the Visitation, and It appears 

 by a note to the entry of the pedigree of Goring 

 of Kingston, that the arms assumed (those of 

 Goring of Burton) were respited for Justification 

 thereof, and Sir William Dugdale m his own 

 hand adds " but nothing done therein." 



The kindred of the Kingston Gorings then was 

 not admitted by the heralds, and the Visitation 



