Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 434
s no respite to this con-tact with dirt; and the wonder is, not that we should from time to timesuffer from its presence, but that so small a portion of it would appear tobe deadly to man. The Professor then goes on to develop a very re-markable theory, which attributes such diseases as cholera,… … Fig. 191.—Telescopic appearance ofjjipiter and Satellites. IT may be stated at once, that this velocity has the amazing magnitudeof 185,000 miles m one second of time, and that the fact of light re-quiring time to travel was first discovered, and the speed with which itdoes travel was first…
Inventions
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