160 On Extinct Animals, *• 



top of a pole on the eastern turret of the Royal Observatory at 

 Greenwich, at the moment of 1 o'clock p, m., mean solar time. 

 By observing the first instant of its downward nwvement, all 

 vessels in the adjacent reaches of the river, as well as in most of 

 the docks, will thereby have an opportunity of regulating and 

 rating their chronometers. ^ 



The ball will be hoisted halfway up the pole at five minutes 

 before 1 o'clock, as a preparatory signal, and close up at two 

 minutes before 1. By command of their Lordships, 

 «ft}jr! JOHN BARROW. 



I cannot forbear adverting once more, as I did in a letter 

 which appeared in one of your former Numbers, to the high de- 

 gree of usefulness which would accrue, not only to the shipping 

 in Leith Roads, but to the public in general, from the Observa- 

 tory on the Calton Hill adopting the same method of pubKsh- 

 ing the true njcan solar time as that which has now been adopted 

 at the Royal Observatory at Greenwich. I remain, &c. 



R. WAUCHOPE, 

 To Professor Jameson. Captain Royal Navy. 



MEMOIR ON THE QUESTION, WHETHER ANY LAND ANIMALS 



HAVE CEASED TO EXIST SINCE MAN's FORMATION; AND WHE- 

 THER MAN HAS BEEN CONTEMPORANEOUS WITH SPECIES NOW 

 LOST, OR APPEARING NO LONGER TO HAVE REPRESENTA- 

 TIVES ON THE EARTH ? By M. MARCEL DE SERRES. 



We have already proved, by a great number of facts, that 

 human bones and various objects of art being found in muddy 

 deposits, where species that are now lost are also discovered, this 

 medley could occur, only because these species had become ex- 

 tinct since the appearance of man. We may, however, arrive 

 at the same conclusion by other proofs than geological facts, — 

 and this we shall now endeavour to demonstrate. 



These proofs may be drawn, 1*^, from the representations of 

 the animals on the monuments of antiquity, which, endowed 

 with all the conditions necessary to the possibility of their ex- 

 istence, have no longer representatives on the earth ; whbnce fol- 



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