52 Anah/scs of Books. [Jan. 



eiTor of a whole minute in an observation of altitude affects the 

 consequent calculation in the proportion of about 200 feet for the 

 more distant station, and 130 to 150 feet for the nearer. But 

 the instrument which was used should with due care <rive angles 

 true within that quantity ; and the observer was enjoined to take 

 the angles to the nearest minute.* 



It woidd be an extreme supposition that the errors have in 

 every instance been the highest possible, and on the side of 

 excess. Assuming, however, that they are so, the elevation as 

 observed from the two nearest stations is not reduced below 

 26,457 feet and 26,467 feet, or, on the mean of both, 26,462 

 feet above the plains of Gorak'hpur. 



We may safely, then, pronounce that the elevation of Dhawa- 

 lagiri, the white i?wuntain of the Indian Alps,f exceeds 26,862 

 feet above the level of the sea ; and this determination of its 

 height, taken on the lowest computation of a geometrical mea- 

 surement, is powerfully corroborated by the measurement of an 

 inferior, though yet very lofty mountain, observed from stations 

 in Rohilkhand. 



Article XI. 

 Analyses of Books. 



I. Philosophical Transactions for the Year 1817, Part IF. 



This part contains the following papers : 



Description of a Thermometrical Barometer for measuring 

 Altitudes. By the Rev. Francis John Hyde Wollaston, B.D. 

 F.R.S. 



Observations on the Analogy which subsists between the 

 Calculus of Functions and other Branches of Analysis. By 

 Charles Babbage, Esq. M.A. F.R.S. 



Of the Construction of Logarithmic Tables. By Thomas 

 Knight, Esq. Communicated by Taylor Combe, Esq. Sec.R.S. 



Two general Propositions in the Method of Differences. By 

 the Same. 



Note respecting the Demonstration of the Binomial Theorem 

 inserted in the last Volume of the Philosophical Transactions. 

 By the Same. 



On the Passage of the Ovum from the Ovarium to the Uterus 

 in Women. By Sir Everard Home, Bart. V.P.R.S. 



Some farther Observations on the Use of Colchicum Autum- 

 nale in Gout. By the Same. 



* The writer of this was acquainted with the instrument, and knew the degree 

 of precision which it comport*. 



t Sans Dhawala (white), Giri (mountain). It is the Mont Blanc of the 

 Himalaya. 



