Page 156 and he would have borrowed a hh of corne of ye Indeans, hh is probably hogshead.
As soon as you find you can gradate tolerably with the pen, take an H. or hh.
If the level descends as far as to the orifice in the partition, hh', the gas will flow out without causing the apparatus to move.
Fig. 188 (left-hand illustration) shows G (groove) at top, and hh (the haunch) at the bottom.
A little further back there were constructed two cabins, G and hh.
An "hh" pencil for instance, might do, but the imprint would be hardly visible on the palm.