A PERSEID METEOR CROSSING THE CONSTELLATION 
ANDROMEDA. 

THE above Photograph was taken with a Common 
Portrait-lens on a }-pl. Camera. Though clock-work was 
used to counteract the rotation of the earth during the 
40-minutes exposure, such correction is not necessary. If 
any Camera, focussed for distance, is simply pointed 
towards the sky, and any Meteor which seems to cross 
the field-of-view of the lens, is carefully timed, and the 
time of the commencement and finish of the exposure 
noted, a valuable record may be obtained. In this case, 
though, the Stars will not appear as dots on the plate; 
but drawn out into lines, which, however, are easily 
distinguished from Meteor trails. 
F. W. LONGBOTTOM. 
