Show How to PhOI Photograph graph Cloud Clouds With Cam Camera ra raA A few tew weeks ago 10 the French meteorological me me- office Invited raphers to submit photographs of the iky ky taken In varying circumstances with Ith u u. view v to to making use of ot the pictures pIc plc tur tures fI In the study of ot weather condi condl i i s. s I j t i 1 tg Clouds are said to be b difficult to i photograph but till this Is only the case where one wishes to photograph a landscape at the same time When the object Is la to make negatives of ot clouds cloud only a quick exposure with nn any any- ordinary camera will do the work Amateurs with cheap cameras which have hn only one sn snapshot speed can get set over ver the difficulty by stopping down the lens to less than half halt its usual opening Then Ihen they must be careful Ito to develop the film Ulm or plate until the mage e of ot the thc clouds Is Just beginning to show on the back hack when It will be beL time ime L to put the film Ulm In the fixing bath f Those w with Ith class better-class cameras may maye Ise e self screen plates down I stopping down I o 0 FIG and making an exposure of of ne I part of ot a second I t Even better work ma may be done by sI sin n ortI orth chromatic plates and a n color Screen Green reen on the front of ot the lens When using g a n times three-times screen the lens day ny be topped f down to loU 1 and an un exposure 4 ot of tenth one-tenth second or If It e r Is bright one on twenty one sec sec- ij y nd may be given The rule for tor de devel- devel vel p mentioned above 8 applies in all London Tit Bits |