1852.] 



REMARKS ON THERMOMETRIC REGISTERS. 



15 



Weight 



per Specific 

 Cub. Ft. Griivity, 



Iron wood(Ostrja vii'ginica) 



—U.S. 

 Jiid.is tree, or red bud 



(Cons canadensis) — U. P. 

 Locust (Robiuia pseud- 45 



acacia) — U. S. 



Maple, soft (Acer eriocar- 



pum)— U. G. 

 Maple, red, (Acer rubrum) 



— U. S. 

 Maple, sugar (Acer sccliari- 



uum) — U. S. 



Maple, bird's eye — XJ. 0. 



Maple, curly — U. C. 

 Maple, var. bird's eye 



Maple, hard— U. C. 

 Mulberry, red (Morusrubra) 



— u. s. 



Oak (Quercus alba)— U. S. 

 Oak, white— U. S. 

 Oalc, white— II. C. 

 Oak, Quebec — Canada 



33 



41 11 

 36 14 



39 6 



40 15 



36 10 

 36 



39 10 

 35 1 



47 14 

 40 



44 4 



33 11 



Oak, Quebec white — Cauada 



Oak, red ( Quercus rubra) — 



U.S. 

 Oak, black (Quer. tinctoria) 



— U. S. 

 Oak, live (Quercus virens) 



— U. S. 



Pawpaw (Uvaria triloba) 



U. S. 

 Persiniou (Diospyrus vir- 



giuiana) — U. S. 

 I'iue, yellow (Pinus mitis) 

 Piue, Ainer. yellow „ 

 Pine, red (Pinus resiuosa) — 



U.S. 

 Piue, Amer. red „ 

 Pine, pitch (Pinus rigida)— 



South Carolina 



Piue, Virginia „ 



Pine ? — Upper Canada 



Poplar,yell'w(Liriodeudroi: 



tulipifera) — U. S. 

 Poplar (Populus ?) — 



U. C. 



Red bud, sen Judas tree 

 Sassafras (olJlciuale) — U. S 

 Spruce, white (Abies alba) 

 Sycamore, .see Button wood 

 Tamarac (Larixauiericana) 



— U. C. 

 Treenail (R ibiuia pseud 



acacia) — U. C. 

 ^yahult, white- U. S. 

 AVahuit, black (Juglans 



nigra) — U. S. 



Up- 



per Canada 



53 12 

 6 

 32 2 



34 14 

 6 4 



51 II 



22 7 



13 8 

 22 15 



26 n 

 32 



24 3 



20 11 



19 4 



37 4 



23 13 



23 15 



41 



30 5 



28 15 



Close-grained, compact 



Shipbuilding occasionally, 

 chiefly for treeuails 



Ornamental work by car- 

 penters and joiners 



Common carpentry 



Ornamental work ; a jjecu- 

 liar growth of the tree 



Shipbuilding 



Shipbuilding, butnotd'rble 

 Specimen of an infeiior 



quality 

 Shipbuilding, but not in 



repute 

 Shipbuilding 



Heaviest and hardest of the 

 oaks 



Hard, close-grained 



Carpentry work 



Carpentry ; sti'ong 



Carpentry 



Strong and durable 



Much used in shipbuilding 



Same purposes as common 

 deal 



Light, inferior wood 

 From a young tree 



Good for shipbuilding pur- 

 poses 

 Treenails for shipbuilding 



From a young tree 

 Strong, tough, uot liable to 

 split 



its members, au assortment of woods, to be deposited in tlie 

 museum in progress of formation, with duplicate specimens for 

 contribution to the Sydenham Crystal Palace, where the British 

 public may be made familiar with the numerous and e.\tensive, 

 but comparatively little known, treasures of our forests. 



The foregoing list contains a very imperfect enumeration of 

 Canadian woods; it will serve, however, as a beginning of what 

 may be made an exceedingly interesting and highly important 

 kind of information, and easily susceptible of considerable exten- 

 sion, if the Canadian Institute can succeed in collecting, through 



REmaiks on Tliermometric Registers; by Captain J. H. 

 Lefroy, R. A., F. R. S. 



( Continued from Page 31.^ 

 The Committee of the British Association having very recently 

 announced its readiness to supply true standard Thermometers to 

 members of that body and others, at a low rate, it may be hoped 

 tliat these instruments will soon be found in the apartments of 

 Scientific and Literary Societies in Canada: § it may bedesirablo 

 therefore lo refer somewhat more fully to theh verification, than 

 was dent in the previous part of this article. 



(1 .) To determine the zero point, if the thermometer is one with 

 an arbitrary scale, or verify it, if it is graduated to Fahrenheit. 



Fill a quart measure or similar vessel, with ice that has been 

 pounded fine in a bag or cloth, the finer and more uniform the bet- 

 ter. Add a little water, immerse the thermometer, standing upright, 

 in this, up to the point 32 ° on the scale, and after allowing it 

 a little time to settle, read the scale to the nearest tenth of a 

 division : take several readings, with an interval of a minute or 

 two between them, and note them all in the register, whether they 

 vary or not. The observation cannot be made very accurately 

 in "the summer, and the nearer the temperature of the air in the 

 room at the time is to 32 ° Fahr. the better. 



(2.) To determine the boiling point on the scale of the ther- 

 mometer. 



Get any tinsmith to make a vessel for generating steam, after 

 the drawing given below. It consists of a boiler holding about 



c • 



half a gaUou, (b) to which is added a tube {a) about three inches 

 in diameter and ten high , exteiioi to tins, but not communicat- 



§ Regulation ok CouKCiL.-Tliat Standard Thermomeleis made at 

 Kew, be supplied on application to members of lire British Associalion, and 

 Fellows o( ihe Royal siciely, at £\ slg. each. Report, &:e., Belfast Meeting, 

 September, 1352. 



