8 4 



SCIENCE- GOSSIP. 



CONDUCTED BY B. FOULKES-WINKS, M.E.P.S. 



EXPOSURE TABLE FOR AUGUST. 



The figures in the following table are worked out for plates of 

 about 100 Hurter & Driffield. For plates of lower speed number 

 give more exposure in proportion. Thus plates of 50 H. & D. 

 would require just double the exposure. In the same way, 

 plates of a higher speed number will require proportionately 

 less exposure. 



Time, 8 a.m. to 4 p.m. 



Between 7 and 8 a.m. and 4 and 5 p.m. double 



the required exposure. Between 6 and 7 a.m. and 



5 and 6 p.m. multiply by 4. 



Subject 'F. 5-6 



F. 8 



F.ll 



F.16 



F.22 



F.32 



F.45 



F.64| 



Sea and Sky.. 1 -^ s 



i 



T*o 





T2 



1 



l 



4- 



Open Landscape^ ) T 

 and Shipping J 12 ° 





3 2 



tV 



h 



i 



\ 



1 



Landscape, with 

 dark fore- 

 ground, Street 

 Scenes, and 

 Groups 



)* 



JU 



h 



i 



\ 



1 



2 



4 



Portraits in 

 Rooms 



}' 



4 



8 



16 



32 



- 



- 





Light Interiors 



4 



8 



16 



32 



1 



2 



4 



8 



Dark Interiors 16 



32 



1 



2 



4 



8 



16 



30 



The small figures represent seconds, large figures minutes. 

 The exposures are calculated for sunshine. If the weather is 

 cloudy, increase the exposure by half as much again ; if gloomy, 

 double the exposure. 



Reproduction of Photographs. — " About a 

 Famous Camera" and "Photo-litho" are two 

 artistic and well-printed pamphlets submitted to 

 us by Messrs. Penrose & Co., of 109 Farringdon 

 Road, E.G. The first one refers to cameras, and 

 gives every detail of the manufacture of the 

 "Process " camera. To anyone interested in "pro- 

 cess " work it is a most entertaining and instructive 

 little book. The work on photo-lithography is 

 well worth perusal, and we would advise all inter- 

 ested in photo-mechanical printing processes to 

 write to Messrs. Penrose for these pamphlets. 



The Photographic Convention of the United 

 Kingdom at Oxford was undoubtedly a great suc- 

 cess, and the members who met this year will have 

 pleasant recollections — also, we trust, numerous 

 pleasing souvenirs — of their visit. On Monday, 

 July 8th, the members were invited to a reception 

 by the Mayor and Aldermen in the beautiful Town 

 Hall, of which Oxford is so justly proud. After the 

 reception Sir W. J. Herschel delivered the presiden- 

 tial address, the subject being " Colour Photo- 

 graphy." Many beautiful natural colour slides were 

 shown in the lantern, and the President gave a 

 very interesting description of the processes by 

 which they were produced. The various excursions 



to Warwick, Banbury, Compton Wynyates, Kenil 

 worth, Abingdon, etc., and the President's garden 

 party in the grounds of Worcester College were 

 all well attended and enjoyed to the fullest 

 extent by the Conventioners. The local club is to 

 be congratulated upon the efforts made by its 

 members to render every assistance to their brother- 

 photographers, and the members of the Convention 

 owe a debt of gratitude to the Mayor and Corpora- 

 tion of Oxford, as well as to the Oxford Camera 

 Club, for the hearty reception accorded. 



Photographic Christmas Cards. — One of the 

 largest and most comprehensive competitions that 

 has ever been held in connection with photography 

 is probably the " Teb " Photo Christmas Card 

 Competition, which, we notice, is open to all sorts 

 and conditions of photographers. A glance through 

 the list of prizes shows that it has been arranged 

 so as to encourage the merest tyro as well as the 

 practised hand. Two hundred and fifty cash prizes 

 will be awarded, amounting to the nett value of 

 £317 6s. The competition is divided into two 

 classes, amateur and professional ; and some idea 

 of its proportions may be gained when we mention 

 that in the amateur class, for quarter-plate prints 

 alone there are thirty-four prizes to be awarded, 

 the first of which amounts to £10. The competition 

 is not restricted to any special printing process, 

 nor to the use of any particular apparatus. It has 

 been designed solely for the purpose of encouraging 

 photographers who are working for the love of 

 and in the true interests of the photographic art. 

 All that is necessary is to send in the competing - 

 prints mounted in or on the " Teb " series of photo 

 Christmas cards manufactured by Messrs. Chas. 

 Tyler and England Bros., Ltd.. They are to be 

 sent to 70 Copenhagen Street, London, N. The 

 judges selected are all gentlemen well known as 

 critics of the art. 



The Thornton-Pickard Album. — At the time 

 of going to press we have received from the 

 Thornton-Pickard Manufacturing Company an 

 artistic album of prize pictures which have been 

 awarded medals and other prizes during the 1900 

 competition. The book contains twenty pictures 

 measuring 9| in. by 6 in. each. They are all 

 reproduced by the half-tone process, and printed 

 on very fine art paper. It is needless to say the 

 pictures are taken by means of the Thornton- 

 Pickard Instantaneous Shutter, and as such are 

 good examples of the capabilities of this shutter 

 showing the results of exposures varying from 

 ^th of a second to g-th of a second. The first pic- 

 ture, " On the Avon," by Miss Whieldon, is a 

 very pretty view of Warwick Castle. The picture 

 by J. N. Taylor is a fine specimen of high-speed 

 work. It represents a fire-engine being driven at- 

 full gallop, and yet the wheels and horses' legs are 

 quite sharp. Amongst so many really good illus- 

 trations we must draw especial attention to " Un 

 Point a l'Horizon," by P. Dubreuil. It represents 

 two fisherwomen returning with the result of their 

 day's toil ; they are standing on the cliffs, and one 

 woman is pointing out some object on the horizon. 

 The whole composition is full of action, and tells 

 its own story. The plates are nicely bound in a 

 dark brown cover, and form a very complete and 

 most interesting album. Wc understand that the 

 Company will send these albums post free for six- 

 pence, and we can assure our readers that it would 

 be most difficult to lay out that sum to better 

 advantage. 



