4S0 Analysis of Vol. IX. Part I. of the Transactions 
a moveable axis and level of Reichenbachs. The practical as- 
tronomer will find this memoir of great utility. 
6. Description of a Fossil Tree found in a Quarry at Niteskill. 
By the Reverend Patrick Brewster ; p. 103, — 106. With 
a Plate. 
The trunk of this interesting fossil, which was found in the 
coal-formation near Paisley, was five feet long, and had four 
principal roots, each of which was two feet long. The circum- 
ference, taken close at the root, was five feet seven inches and a 
half ; in the middle of the stem four feet and a half ; and at the 
top or fracture three feet nine inches. 
7. Account fa nondescript Worm (the Ascaris pellucidus) 
found in the eyes qf Horses in India. By Alexander 
Kennedy, M. D. F. R. S. Ed. With a Description of the 
Animal, By Captain Thomas Brown, F. R. S. E. ; p. 107, 
— llg. 
An abstract of this paper will be found in this Journal^ vol. i. 
p. 191, 19S. The following is Captain Brown’s description of it. 
Ascaris pellucidus. — Head slightly subulate, with the ex- 
tremity somewhat obtuse ; body smooth, pellucid, of a bluish- 
white colour ; thickest at the centre, and gradually tapering to- 
wards the head, and abruptly towards the tail, which termi- 
nates in a sharp point ; its diameter not being more than one- 
fourth of the head. Length, 1| inch. 
8. Memoir relating to the Naval Tactics of the late John Clerk 
Esq. of Eldin^ being a Fragment of an intended account of 
his Lfe. By the late John Playfair, Esq. F. R. S. Lond. 
& Ed. ; p. 113,-138. 
It is scarcely necessary to inform our readers, that the cele- 
brated manoeuvre of breaking the enemy’s line, by the practice 
of which we have so often annihilated the proudest armaments 
of France and Spain, was the undisputed invention of our 
countryman the late John Clerk, Esq. of Eldin, a country gen- 
tleman who had no practical acquaintance with naval affairs. 
Mr Clerk had begun so early as 1779, to make the principles 
of his system known to his friends. The manoeuvre was first 
successfully practised by Lord Rodney, in April 1782 ; and it 
