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Updated: May 7, 2025
Neither the particulate nor the chemical theories help us here. The mnemic would, but it has its initial and insuperable difficulty, pointed out in another article in this volume, that, as you must have an experience before you can remember it, it in no way accounts for the first operation of arrangement.
The relative inefficiency of the German shell rendered this unnecessary. In addition, as Captain Geyer explains, our troops were specially protected in anticipation of the use of particulate clouds. An examination of our protective device by the Germans obviously led them to believe that resistance to breathing was too great for the protective appliance to be practicable.
In view of the obvious importance of highly irritant compounds capable of existing in a very finely divided, pulverised, or particulate form, research was made in the domain of little volatile substances with boiling points up to 400'0.
He transmits, not himself and his own modifications, but the stock, the type, the representative elements, of which he is a product and a custodian in one. It seems probable that he has no more definite or "particulate" influence over the reproductive elements within him than a mother over the embryo or a vessel over its cargo.
The 'particulate' or 'germ' theory of disease, as it is called, long since suggested, has obtained a firm foundation, in so far as it has been proved to be true in respect of sundry epidemic disorders.
"As to the capacity of fogs to this end, no Londoner needs instruction; and few persons can have failed to notice the immense distances that odors will travel on the 'air breaths' of a still summer night. And there are reasons which require us to believe particulate matter to be more easy of suspension in an unchanged form during any remarkable calmness of atmosphere.
During the period when the infection did spread, the atmospheric conditions were such as would be likely to favor the dissemination of particulate matter. Mr. Power says: "Familiar illustration of that conveyance of particulate matter which I am here including in the term dissemination is seen, summer and winter, in the movements of particles forming mist and fog.
Darwin, with "Pangenesis," and others, using other titles, argued in favour of a "particulate" explanation, but the number of particles which would be necessary to account for the phenomena involved, this and other difficulties, have practically put this explanation out of court.
All these theories have been summed together under the name "micromeristic," that is small-fragmented, or again, "particulate," since they all postulate the existence in the germ of innumerable small fragments seeds which are capable of growing into complete plants or organs under favourable circumstances.
Captain Geyer's remarks are also interesting from a point of view to which we have already referred: they show how much this question of resistance to breathing was exercising the minds of those responsible for German protection. "Particulate" Clouds.
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