Proceedings. xxxi 



On Feb. 8th, the Report of the Meteorological Sub-Committee 

 for 1892 was presented by Mr. P. C. Bayard, honorary secretary 

 of that Sub- Committee. This Report was published in our 

 volume of ' Transactions ' in 1893 (Trans., Art. 109, p. 28). A 

 paper was also read by your President on 'Earth Temperatures,' 

 in which he gave the result of a series of observations made at 

 Croydon in 1892 at depths of one foot and four feet below the 

 surface, and also gave a resume of the subject of ground tempera- 

 tures, pointing out how, owing to the badly conducting properties 

 of the earth, the diurnal and annual heat waves were retarded 

 at progressive depths, and their range diminished ; while at 

 depths beyond that to which the annual heat wave extends the 

 temperature was found to increase with the depth. This 

 paper will be printed in our annual volume for 1893 (Trans., 

 Art. 110). 



On March 8th a paper was read by Mr. Charters White 

 entitled " A simple Method of Photo-micrography," in which 

 he dealt fully with the processes and apparatus which he ad- 

 vocated ; after which a large number of photo-micrographic 

 slides were thrown on the lantern and explained by Mr. 

 White; their beauty and sharpness of detail being much 

 admired. 



On April 12th, Mr. Lovett exhibited and described a series of 

 mechanical fire-making appliances, in which a flint and steel 

 arrangement was put in action by means of a trigger. The Hon. 

 Secretary exhibited and described a specimen of the now rare 

 Solar microscope of the last century. A very interesting paper 

 was read by Mr. A. B. Farn on "Pasteur's Researches on the 

 Cause and Prevention of the Silkworm Disease," some of the 

 results of which Mr. Farn had himself experimentally verified. 

 Glancing at the culture of the silkworm as an industry, he traced 

 the appearance and spread of the disease which were attributed 

 to overcrowding of the young worms on the part of the cultivator ; 

 showing how Pasteur had demonstrated that the disease, which 

 is known as Pehrine, was caused by the invasion of the tissues of 

 the silkworm by a parasitic bacterium, and that it might be 

 communicated by inoculation, by feeding on leaves soiled by the 

 excrement of infected worms, or by infected dust carried in the 

 clothes of the attendants ; and also that it was hereditary, the 

 parasite being found in the ova deposited by infected moths. 

 The special seat of the parasite is in the silk glands, the ducts of 

 which become so blocked as to prevent the spinning of silk. 

 This paper will be printed in our ' Transactions ' (Trans., 

 Art. 111). 



On May 10th, Mr. Lovett read a Report on the opening of a 

 Barrow on the South Downs, near Arundel, recently carried out 

 by members of the Club. Having briefly referred to various 



