A big H/T to Mr. Filthie once again!
Steam Powered Lawn Mowers
The picture clearly implies that the Coldwell was suitable for one-man operation. It looks as if the driver might be able to read the pressure gauge by turning round, but it is not clear if he can see any indication of boiler water level.
The men behind the machine appear to be William H Coldwell, Harry T
Coldwell,and Thomas Coldwell. The first two chaps took out a number of
mower patents, for example No. 796,811 which was issued in August 1905,
but the March 1901 patent referred to above (No. 669,436) was taken out
by Thomas alone, and the August 1902 patent (No. 707,304) by Thomas and