Nature . ce isstartled by a single, rasping yell such as might makethe hair stand on the back of every mouse for a STUDIES OF MR. CLAYDENS work will be a standard one forall students of clouds. When the now inter-national classification was first proposed by the lateRalph Abercromby and the present writer, our pur-pose was to devise a classification for common use atall meteorological stations and in all the navies of theworld. It is evident that such a classification must besimple and practicable. A great number of formsmust lead to constant errors when used by ordinaryobservers. The
Nature . ce isstartled by a single, rasping yell such as might makethe hair stand on the back of every mouse for a STUDIES OF MR. CLAYDENS work will be a standard one forall students of clouds. When the now inter-national classification was first proposed by the lateRalph Abercromby and the present writer, our pur-pose was to devise a classification for common use atall meteorological stations and in all the navies of theworld. It is evident that such a classification must besimple and practicable. A great number of formsmust lead to constant errors when used by ordinaryobservers. Therefore we only proposed the ten typesgiven now in the international cloud atlas. We were well aware, however, and expressed theview in plain words, that these ten forms are notsufficient for special studies of the transformation ofclouds or of the relations between cloud form andweather. For these cases each of the ten great tvpesmust be divided into several subspecies, to whichproper names must be .—Cirro-nebula changing to c quarter of a mile around. The Arch-mouser is on thetrail, and such a master of his craft that he appearsat times to toot his horn in contempt of his , is this sudden shriek used to start any mousethat may be lurking below, so that when moving itmay be more readily discerned? Mr. Boraston, too,sometimes wants in know why. The eighteen photo-graphs which illustrate this nicely got up volume arealmost beyond praise. We have --(lei ted this one forreproduction, not because it is by any means the mostbeautiful, but because of the cleverness with whichthe whole of this rock, with its seaweed and itsoyster-catchers, ha, been focused; it will appealstrongly to those who love our west coast and itsbirds. The whole book will be welcomed andtreasured up by the great fraternity of British bird-men. O. V. Aplin. NO 1896, VOL. 73] Various attempts have been made to extend thescheme in this way. Abbe Maze in France, in Germany, the Rev. F.
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