Photographic Reproductions 157 



This produced a difficulty of swallowing, which threatened 

 inanition, and the cause of it was not detected for three 

 months, the patient having referred the sense of obstruction 

 to a lower position, about the level of the cricoid cartilage. 



Mr. Busk reported that Professor Frankland had found 

 A can swallowed nux vomica with impunity, and had shown 

 that the minute pellets, voided by them, consisted of clear, 

 highly-refracting particles, almost entirely soluble in alcohol. 

 These, he suggested, might consist of strychnine and the 

 immunity be due to its not being absorbed by their alimen- 

 tary canal. This alkaloid also was not poisonous to 

 cockroaches. 



Dec. I2th, I34th meeting. Sir H. James informed the 

 members that photography was now largely employed for 

 transmitting to officers accurate representations of all 

 articles of military equipment ; a foot rule, to give scale, 

 being always included. He also said that it was proposed 

 to obtain by photozincography facsimiles of the noted 

 Limancas archives. These require absolute accuracy in 

 reproduction, for they mostly consist of despatches in cypher, 

 from documents in very bad Latin. Progress, he reported, 

 was being made with the reproduction of Domesday Book, 1 

 but the county of Kent was at present omitted, since Mr. 

 Lakin had already published in facsimile a portion of that 

 county. The reproduction of the Shakespeare folios of 

 1620 had been suspended, owing to failure of funds. He 

 also mentioned the completion, in all its details, of the 

 Trigonometrical Survey of the British Islands, commenced 

 in 1783. An arrangement was now in progress to connect 

 it with the Survey of Belgium ; this, with the Prussian one, 

 and it with the Russian. The completion of that work 

 will give an exact measurement of an arc of parallel from 

 the west of Ireland to the Ural Mountains. In order to 

 link up Britain with Belgium, part of France had to be 

 crossed. For this the French Government had afforded 

 every facility to our officers, and its own Survey staff had 



1 The first instalment, the part relating to Cornwall, was published 

 before the end of 1861. 



