276 ANNUAL OF SCIENTIFIC DISCOVERY. 



In treating the subject, he dealt with two questions : 1st. Can. 

 di:^('ase be transmitted with humanized lymph P 2d. Is humanized 

 lymph of long standing a prophylactic against small-pox? In 

 answer to the first question, he did not believe that every possible 

 disease could be transmitted by lym[)h. To suppose that cholera 

 and some other forms of disease were produced by vaccination 

 was not only irrational, but simply absurd ; but, at the same time, 

 he was compelled to admit tiiat the transmission of disease was 

 not only possible, but must be received as an acknowledged fact. 

 Dr. HIanc gave instances to show that two forms of disease, par- 

 tirulurly a kind of skin disease and syphilis, have been unmistaka- 

 bly transmitted by vaccination. 



With regard to the second question, as to the efl5cacy of human- 

 ized lymph. Dr. Blanc answered it in the negative, as he found 

 the humanized lymph of long standing lost much of its anti-vari- 

 olic power, and stated that, far from being alone in this opinion, 

 he was supported by all the best authorities on vaccination. 

 M. Simon, after a careful study of the progressive successes of vac- 

 cination in the Prussian army, found that the vaccinations of 1836, 

 when tested by subsequent susceptibility to cow-pox, were not so 

 successful as those of 1813. There was no longer the same im- 

 munity as was formerly given, and the cases of fatal result from 

 vaccination had also largely' increased. Dr. Blanc quoted copi- 

 ously from returns of various public institutions to show that the 

 number of cases of post-vaccinal small-poy had steadily increased 

 since the use of humanized lymph became general. On the other 

 hand, on examination of the cases of people who had taken cow- 

 pox from milking cows, it was found that they still enjoyed per- 

 fect immunity from small-pox, as was shown by Dr. i31anc in a 

 variety of statistical extracts. The remedy he proposed was sim- 

 ply to return to the system of Jenner. Vaccination direct from 

 the heifer, or animal, was no new or untried system, and had 

 been established in many large cities of Europe. The advantages 

 of the system were a removal of the danger of infection from 

 other disease, as the bovine race was not subject to such diseases 

 as might be transmitted to man ; that the sj)ontaneous cow-pox 

 was not likely to lose its essential qualities ; and it was easy always 

 to have on hand a good supply of vaccine matter by these means. 

 No fatal results had been recorded as arising from the use of the 

 animal 13'mph ; and the conclusion of Dr. Blanc is. that to render 

 compulsory vaccination efficacious, and to complete the great 

 work of Jenner, they must return to the system of taking the 

 lymph from the animal, and so restore the glory and usefulness 

 and prestige of Jenner's great remedy. 



PnOTOGRAPHIC REPRESENTATIONS OF THE PULSE. 



Dr. Ozanam, of Paris, has invented an ingenious apparatus for 

 rendering the variable beatings of the pulsi; visible. It consists 

 of a camera hioida, about 10 inches wide, in which a piece of 

 mechanism, moving at a uniform rate, pushes a- glass plate, pre- 



