[1853. 



SCIENTIFIC INTELLIGENCE. 



Slonthly meteorological Register, nt Ilcr Majcwly's Mngnetlcnl Obfcivatory, Toronto, Cnnndn West.— .Tii!y, 1853. 

 Lalitiiik 43 (%. 3D,4 min. Nm-lh. Longiliah, 79 (%. 91 min. Wed. Elevation aliovc Lake Onlnrio : lOS fed. 



ID 



Su?ii oj the Atmospheric Current, in miles, resolved into the four Cardinal 

 directions. 



, East. 

 505.17 



Soulh. 

 654.28 

 3.33 miles per hour. 

 17,9 miles per hour, from 2lo 3 p.m. on 30th 

 30lli : Mean velocilyj 10.10 mile.s per hour. 

 25lh : Mean velocity, 0.20 ilillo. 

 dillo. 

 d.llo. 



Norlli. West. 



1063.39 977.60 



Moan veloeily of tlio wind 

 Maximum velocity - - - 

 Most W[ndy day - - - 

 Least windy day - - - 



Hour of greatest mean velocity - 3, p.m. Mean velocity, 5,84 

 Hour of least ------ 4,a.in.Mean velocity, 1.10 



Mean diurnal variation - - - 4 74 miles. 



The Velocity of the Wind lor a space of" four mmutes during the Thunder 

 Storm on the night of" the 29lh, was at the rate of 38 miles per hour. 



The ci>lumn headed '* Magnet" is an attempt to dislinguish the character 

 of each tiny, as regards the frequency or e.xlent of the llucliialions of the 

 Magnetic declination indiealed by the self registering instrnnienis at Toronto. 

 The classification is to some extent arbitrary, and may require fulure modi- 

 fication, but has been found tolerably definite as far ns applied. It is as 

 follows :— 



((?) A Marked absence of disturbance. 



(J>) Unimportant movements not to he called disturbance. 



(c) Marked disturbance — whether shewn by frequency or amount of 

 deviation from the normal curve — but of no great importance. 



(d) A greater degree of disturbance— but not of long continuance. 



(e) Considerable disturbance — lasting more or less tlie wnole day. 

 (/) A Magnetical dislurbance of the first class. 



The day is reckoned from Noon lo Nooji. If two letlers are placed, the 

 first applies to the earlier, the latter to tlie later part of the trace. Although 

 the Declinalion is particularly rcfi^rred lo, it rarely happens that the same 

 terms are not applicable to the changes of the Horizontal Force also. 

 Thundm iilorms.~W\ Thunder Storm 7 A. M. 



9lh 41eavy Thunder Storm, 1 to 3 P. M. Kain and Hail. 



lllh Thunderstorm, Lightning and Kain 3 to 3—30 P. M. 



29th Thunder Storm, 2 to 4 P. M. Tremendous ThuiuLT Storm with 

 Hail, Rain and high wind, from 10—30 P. M. till about midnight. 



REVIEWS. 



Grahatn'a Elements of Chcmidrj. Second American Edition, Edited 

 with notes, by Robert Bridges, M. D. Blanchard cO Lea, Philadelphia. 

 This work is undoubtedly ono of tho most valuable additions to 

 Chemical Literature, that has been made for some years, and fully 

 sustains the high character of its t.tlenteJ author. Mr. Graham, since 

 the death of Edward Turner, has occupied tliu Chair of Cheiiiistry iu 

 University College, London, he has long occupied a promineLt position 

 among the chemists of Europe, and many years e.\peticiice iu teach- 



Highest Barometer - - 29.918, nt 3 A. M.,on 19ih ? Monlhly range: 

 Lowest Barometer - - 29,135, at midnight on 29lh ^ 7S3 inches. 

 Highest observed Temp. - 90.1, at 3h. 35m., P.M.,on 21sl t Monthly range; 

 Lowest regist'd Temp. - 48.5, at midnight on 31sl S 41.0 



Mean Highe,st observed 'I'emperalure - - 74 99 > Mean daily range i 

 Mean Minimum Thennomelcr - - - - .56 05 J 18.33 



Greatest daily range - - 29,3 from 4h. 30m., P.M., of 22nd to A.M., of 23rd. 

 Warmest day - - 21si - - .Mean Temperalure - 70.72 > Ddll-rcnce : 

 Coldest day - - - 3l.st - - Mean Temperature - 50.47 S 20 25 

 IStli— At 9h. P. M., large Meteor in N. falling in a lino from a^'pha Lyire, 

 through Polaris. 

 The " Means " are derived from six observations daily, viz., at and 8, 

 A. M., and2, 4, 10 and 12, P. M. 



Comparative Table for JTiilF. 



ing have tjiven him a remailcablo facility of imparting knowledge in 

 tho most 'clear and comprehensive manner. There are many facts and 

 theories connected with Chemistry and Chemical Physics which it is 

 exceedingly difficult to render intelligible to the majority of students ; 

 such, for instance, as the action of the Galvanic Battery ; the doctrine 

 of chemical equivalents, etc., &c. ; and we may safely assert that wo 

 know of no work in whicli these subjects are so clearly antj elegantly 

 described as in the ono before us. - 



In the part now published, we have an excellent treatise on heat, iu 



