SCIENCE- GOSSIP. 



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



EXPOSURE TABLE FOR, JULY. 



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 



P. 5-6 



F.8 



F.ll 



F.16 



F.22 



F. 32 



F.45 



i 



F.64 



Sea and Sky . . 



500 





iio 



J 5 



A 



l 



Open Landscape 

 and Shipping 



}* 



A, 



32 



A 



a 



1 



I 



1 



Landscape,with 

 dark fore- 



) 

















ground, Street 

 Scenes, and 

 Groups 



r 



16 



i 



1 



A 



1 



2 



4 



Portraits in 

 Booms 



V 



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. 



Photographic Convention of the United 

 Kingdom. — We have received from Mr. F. A. 

 Bridge, the Hon. Secretary of the Convention, the 

 official guide to the Oxford meeting, which, as 

 already announced in a previous issue of this 

 journal, will be held from July 8th to 13th in- 

 clusive. The guide is very tastefully compiled 

 and contains several fine photographic illustrations 

 of places to be visited during Convention Week, 

 together with a frontispiece portrait of Sir W. J. 

 Herschel, the President-elect, from a negative by 

 Miss Acland. The meetings, also exhibitions of 

 photographic apparatus, pictures, etc., will be 

 held in the New Municipal Buildings during the 

 week. On Monday, July 8th, the Hon. Secretaries 

 will attend all clay from 10 a.m. in the Assembly 

 Room. Members are requested to report them- 

 selves as early as possible to receive their badges 

 of membership and secure tickets for the excur- 

 sions. A plan of Oxford City, with references 

 showing the principal buildings and other places 

 of interest, is shown on p. 8 "of the guide. The 

 conversazione and evening meetings will be held 

 in the Town Hall and Assembly Rooms. The 

 annual dinner and smoking concert, to which 

 ladies are invited, will be held in the Clarendon 

 Hotel. There will be an exhibition of specially 



selected lantern slides under the direction of Mr. 



F. A. Bridge in the Town Hall after the Pre- 

 sident's address on Monday evening. On Thurs- 

 day evening a collection of slides will be shown 

 by the members of the Oxford Camera Club, and 

 on Friday the lantern, microscope, and polariscope 

 will be used in connection with Mr. Wyatt's 

 paper. By the courtesy of the authorities every 

 facility will be given to those members desirous 

 of photographing the colleges, college grounds, 

 gardens, parks, etc., from July 8th to 13th in- 

 clusive. On p. 51 of the guide will be found a 

 list of dark rooms which are placed at the disposal 

 of the members. The members of the Local Com- 

 mittee will be in attendance at the Town Hall 

 early on Monday to act as guides, and parties 

 will, at convenient times, be conducted over the 

 colleges. The opening conversazione will take 

 place in the Town Hall at 7.30 p.m., when 

 the members will be officially welcomed to the 

 city by the Right Worshipful Mayor of Oxford, 



G. Claridge Druce, Esq., M.A., who will be sup- 

 ported by the Reception Committee and the 

 members of the Oxford Camera Club. The Pre- 

 sident (Sir W. J. Herschel) will then deliver his 

 address, and the evening will conclude with an 

 exhibition of lantern slides. On Tuesday, the 9th, 

 there will be a river excursion to Abingdon and 

 Dorchester A special steamer will leave Fally 

 Bridge at 9 a.m., a short stay being made at Iffley 

 to enable members to visit the old Norman church, 

 and at other places to photograph picturesque 

 parts of the river. At Abingdon the members will 

 be received by the Mayor, Mr. Alderman J. T. 

 Morland, and after lunch will proceed to Day's 

 Lock, the Teturn journey commencing at 7 p.m. 

 The annual meeting and election of the new 

 Council will take place on Wednesday in the 

 Assembly Rooms at ten o'clock. In the afternoon, 

 at three, the President invites the members to a 

 garden party in the gardens of Worcester College, 



. when the official group will be taken. The annual 

 dinner will be held in the evening at 7 p.m. On 

 Thursday there will be an excursion to Warwick, 

 conducted by Mr. Harold Baker. The Warwick 

 Dry Plate Company have kindly invited the 

 members to luncheon, which will be presided over 

 by Sir Montague Nelson, supported by the Mayor 

 of Warwick. The Earl of Warwick has ordered 

 that special facilities be afforded the members to 

 take photographs of the exterior of the Castle, and 

 special arrangements have been made for members 

 to photograph the Parish Church, the Beauchamp 

 Chapel, Lord Leycester's Hospital, etc. There will 

 also be excursions from Warwick to Guy's Cliff 

 and Kenilworth. In the evening, at the Town Hall, 

 Oxford, Professor H. H. Turner, M.A., F.R.S., 

 Savilian Professsor of Astronomy, will deliver an 

 address on " Photography in Relation to Astro- 

 nomy." On Friday, July 1 2th, there will be excursions 

 to Banbury, Broughton Castle, and Compton Wyn- 

 yates. At Broughton Castle special facilities for 

 photographing the castle have been kindly granted 

 by Lord Algernon Gordon Lennox. At Compton 

 Wynyates there will be a picnic lunch in the 

 grounds by permission of the Marquis of North- 

 ampton. There will also be a meeting at the 

 Town Hall at 8.30 p.m., when papers will be read 

 by Dr. Moritz van Rohr, Mr. C. Watmough-Webster, 

 and Mr. W. Wyatt. This will practically bring 

 the convention to a close, although parties will 

 be formed on Saturday for short excursions as 



