29-i Nautical Ephemeris. — Dr. Henry Clarke. 



readers to two important errors of the equation of time, in the 

 Nautical Ephemeris for 1S18, and seven in the one for the year 

 1819. It becomes of consequence these errors should be known, 

 as during the last year several vessels put into Portsmouth, out 

 of their course, for the correction of their chronometers; which 

 appearance of errors arose from the misprint of the Ephemeris. 

 1818. min. sec. min. sec. 



March 9 for 19 54 read 9 54 

 May 8 — 4 43 6 —3 43 6 



1810. 

 April 12 — 1 58 — 5S 



13 ~ 1 41 9 — 41 9 



14 — 1 26 1 _ 26 1 



15 — 1 10 6 _ 10 6 



June 5 — 1 22 — 2 22 



28 — 1 40 — 2 40 



Dec. I, the letters " add," the top of the column, page 134, 

 should be " subtract." 



I am, sir, your obedient servant, 



R. Wbbster. 



DR. HENRY CLARKE. 



It Is with concern that we record the decease of another 

 eminent mathematician and philosopher. Dr. Henry Clarke, 

 on the 29th of April, at his house at Islington, in his .76th 

 year. His death was occasioned by a fit of apoplexy, with 

 which he was seized on tlie preceding day. He was fifteen 

 years Professor of History, Geography, and Experimental Philo- 

 sophy at the Royal Military College, from which he had just re- 

 tired'. He was the author of several mathematical and literary 

 elementary works, and had an extensive knowledge of philosophy, 

 mathematics, and the languages. By the Universty of Edin- 

 burgh he was honoured and rewarded with the degree of Doctor 

 of Laws. He was a contributor to many mathematical and perio- 

 dical journals, and corresponded with most of the eminent men of 

 the last century. He has left behind him a blind aged widow to 

 whom he was married fifty-two years, and a family of two sons 

 and four daughters. His elegant and very choice collection of 

 philosophical instruments, by which he delivered his lectures, 

 and his select library of scientific books will shortly be given to 

 the puWic by sale at auction. 



LIST OF PATENTS FOR NEW INVENTIONS. 



To Gilbert Lang and Robert Smith, both printers in Glas- 

 gow, for their mode of producing the Swiss new deep and pale 



reds 



