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Figure lo. — Chart from Seed's meteorograph. (From Lacroix, op. cit. 



footnote 22.) 



wind.'" Beckley and Draper caused it to move a pen- 

 cil through gearing; the others used with it electro- 

 magnetic counters actuated by rotating contacts. 



'" T. R. Robinson, "Modification of Dr. Whewell's Anemom- 

 eter for Measuring the Velocity of the Wind," Report of the 16th 

 Meeting of the British Association for the Advancement of Science, 7846, 

 1847, pt. 2, p. 111. 



As has been indicated, the Signal Corps used all six 

 systems, a panopoly of gadgetry which must have 

 been wondrous to behold. Its Secci meteorograph, 

 which had attracted much attention at Paris, was esti- 

 mated to have cost 15,000 francs. Abbe reported in 

 1894 that the instruments were long kept in the ap- 

 paratus room "as a fascinating show to visitors and a 



110 



BULLETIN 228: CONTRIBUTIONS FROM THE MUSEUM OF HISTORY AND TECHNOLOGY 



