_So as to be held in the hand._ _To actual temperature._ Min. Min. Soft calcareous stone in 8 In 25 Hard stone in 10 In 34 Common marble in 11 In 35 White marble in 12 In 36 Silver in 13-1/2 In 40 The whole of these experiments were made with the utmost care and attention, not only by myself but in the presence of several persons, who also endeavoured to judge of the first degree of temperature by holding the bullets for half a second in their hands, and the relations of which are more exact than those of the actual temperature, because that being variable the result must sometimes vary also. With a view to avoid that prolixity which would necessarily attend the continual repetition in a comparative statement of the refrigeration of these different bodies, we have connected them in a general table, and taking 10,000 for the standard of comparison, their differences may be seen at one view. A TABLE OF THE _Relations of different Mineral Substances._ IRON, with First Entire Refrig. Refrig. Emery 10000 to 9117 -- 9020 Copper ---- to 8512 -- 8702 Gold ---- to 8160 -- 8148 Zinc ---- to 7653 -- 6020 6804 Silver ---- to 7619 -- 7423 Marble White ---- to 6774 -- 6704 Marble common ---- to 6636 -- 6746 Stone calcareous hard ---- to 6617 -- 6274 Gres ---- to 5596 -- 6926 Glass ---- to 5576 -- 5805 Lead ---- to 5143 -- 6482 Tin ---- to 4898 -- 4921 Stone calcareous soft ---- to 4194 -- 4659 Clay ---- to 4198 -- 4490 Bismuth ---- to 3580 -- 4081 Chalk ---- to 3086 -- 3878 Gum ---- to 2325 -- 2817 Wood ---- to 1890 -- 1594 Pumice-stone ---- to 1627 -- 1268 EMERY, with