1874 The Monthly Microscopical Journal  
1873.-It is somewhat singular that much as has been done in the direction of discovering what is the exact nature of the cause of hay-fever, it is yet a question which can hardly be considered perfectly answered. Yet certainly we cannot but say that the author of the present work has done much toward its discovery, and has certainly, in our opinion, put US better on the road than we were previously. Of course our readers are aware that already much had been done toward the completion of tho
more » ... mpletion of tho theory of the pollen origin of the disease when Mr. Blackley took the question in hand. But he has certainly merited great credit for the ingenuity he has displayed in inventing and constructing the numerous contrivances which are described in this volume, for the purpose of collecting, under certain given conditions, the amount of pollen present in the atmosphere. Indeed in all that relates to the microscopical examination of the matter he has been at considerable pains to render his conclusion irrefutable, and hence his opinions deserve most careful consideration. But we think it a pity that he has in many cases gone over ground which really was sufficiently trampled already, that he has in dealing with the question endeavoured to prove facts which might be regarded as already adequately cleared up.. Of course one of the great difficulties of his view of the causes of this disease is the fact that several of the symptoms presented by the more severe cases of the malady are not referable to the influence of the pollen grains as externally irritating the mucous membrane. But the author offers the following remarks which seem to us worthy of consideration :-lr I have found by experiment that the granular
doi:10.1111/j.1365-2818.1874.tb00821.x fatcat:jifdfozijfadlfsbnzgr7rq4hq