1905-6.] MINIATURE STEAM ENGINES. 2 
this thing twice, and you will notice a big drop in the relative sizes of the 
two engines when you compare them. 
I believe I could make a smaller one if I had to, but if I recover 
on this one so much the better. 
“Tiny Tim,” as I have named this smallest of all engines, is made 
of gold and _ steel, and is so small-that a common house-fly seems large 
by comparison. It fits easily into the smallest 22 short empty cartridge 
balance wheel and stand. It weighs four grains Troy complete, that 
is about the weight of a common match. It takes 120 such engines to 
weigh one ounce, 1,920 to weigh one pound, and 3,840,000 engines equal 
one ton. 
The engine bed and stand are of gold. ‘The shaft runs in hardened 
and ground steel bearings inserted in the gold bed. 
«Tiny Tim,” the smallest engine ever built. Photo actual size, the fly being shown 
“for comparison. A protecting covering, not shown, can be screwed 
down on to the ebony base. 
These bearings are counter bored from the inside to form a self-oiling 
bearing. The fly wheel has a steel centre and arms, with a gold rim; 
and this part, the complete wheel, weighs one grain. 
The cylinder is of steel with octagonal base highly polished. The 
stroke is 1-32 of an inch; bore, 3-100 of aninch. Seventeen pieces are 
used in the construction of this engine. 
