li 
— 
=> 
2 Dy 
Fia. 9.—Sea-going Sand-bath. 
For evaporating or heating in flasks or beakers, a small sand- 
bath suspended on gimbals has been found very useful... . 
A, A (Fig. 9) are iron brackets screwed to the ship’s side; B is 
the outer frame, made of cast-iron, and moving on an axis par- 
allel to the ship’s length; C is the inner frame, also of cast- 
iron, and moving on an axis at right angles to that direction. 
The size of the iron frame was arranged so as to receive one of 
Bunsen’s thermostats in ordinary use in laboratories, and was 
furnished with a cast-iron plate when used as a sand-bath, with 
a piece of strong copper-wire gauze stretched over a frame for 
boiling purposes, and with two cast-iron plates with large holes 
to receive water-baths. The half-inch iron rods, D, D, are fixed 
to the lower side of the inner frame, and the leaden counter- 
poise E is movably attached to them by screws. 
For collecting water from the bottom we use a water-bottle, 
originally, I believe, the invention of a Swede, but which was 
first suggested for use in the Challenger by the visit of the 
German North Sea Expedition to Leith, a visit which we have 
to thank for numerous other most useful hints. 
