138 PHILOSOPHICAL TRANSACTIONS. [aNNO 1685. 



of sal ammoniac, found together with the sulphur in those places, it appears to 

 be a kind of nitrum calcarium; which seems to be confirmed from the great 

 quantity of lime-stone round about Naples ; many beds of it lying up and down 

 the Terra di Lavoro, or Campania Felice, 



Of the Weight of a Cubic Foot of several Bodies, tried in a Vessel of well-sea- 

 soned Oak, whose Concave was an exact Cubic Foot. By the Direction of the 

 Philosophical Society of Oxford. N° 169, p. 926. 



The following bodies were poured gently into the vessel, and those in the 

 first 12 experiments were weighed in scales turning with 2 ounces, but the last 

 7 were weighed in scales turning with 1 ounce. The pounds and ounces here 

 mentioned are avoirdupois. 



lb. oz. 



1. A foot of wheat, worth 6s. a bushel 47 8 



2. Best wheat, worth 6s. 4d. a bushel. . 48 4 



3. The same sort measured again 48 2 



4. White oats of the last year 29 8 



5. Blue pease, much worm-eaten 49 12 



6. White pease, of last year but one 50 8 



7. Barley of last year 41 2 



8. Malt, of two months old 30 4 



9. Field beans, of last year but one .... 50 8 

 10. Wheaten meal, unsifted 31 



lb. oz. 



11. Rye meal, unsifted 28 4 



12. Pump water 62 8 



13. Bay salt 54 1 



14. White sea salt 43 12 



15. Sand 85 4 



16. Newcastle coals 67 12 



17. Pit coal from Wednesbury 63 



18. Gravel 109 5 



19. Wood-ashes 58 5 



Another list of the specific Gravities of Bodies, which are in Proportion as the following Numbers. 



Pump water 1000 



Fir dry 546 



Elm dry 600 



Cedar dry 6l3 



Walnut tree dry 631 



Crab tree middling dry 765 



Ash middling dry, and of the outside lax 



part of the tree 734 



Ash more dry, and about the heart 845 



Maple dry 755 



Yew of a knot or root, 16 years old 760 



Beech middling dry 854 



Oak very dry, almost worm-eaten 753 



Oak of the outside sappy part 870 



Oak dry, but of a very sound close texture 929 



The same tried another time 932 



Logwood 913 



Claret 993 



Moil cider not clear 1017 



Sea water settled clear 



College plain ale, the same 



Urine 



Milk 



Box 



Redwood 



Sack 



Beer vinegar 



Pitch 



Pit coal of Staffordshire 



Speckled wood of Virginia 



Lignum vitae 



Stone bottle 



Ivory. 



Alabaster 



Brick 



Heddington stone, the soft lax kind 



Burford stone, an old dry piece 



Paving stone, a hard sort from about Blaidon 



1028 

 1028 

 1030 

 1031 

 1031 

 1031 

 1033 

 1034 

 1150 

 1240 

 1313 

 1327 

 1777 

 1826 

 1872 

 1979 

 2029 

 2049 

 2460 



