278 Notices respecting New Books. 
Materials, even to Tron, as the experiments of Mr. George 
Rennie in the beginning of your present Number amply testify) 
did a great deal of mischief 12 years ago, by his experiments and 
writings, having the tendency, to mislead thousands into the very 
same errors, which were acted on in 1273, in supposing that 
greal weights could pass, on any wheels (however tr uly eylindri - 
cal) without crushing brittle Stones, such as those undoubtedly 
are which alone are procurable, on nine-tenths of the lengths of 
all the main British Roads. 
The sooner Men of science céase fo notice the absurd objections 
raised against adopting, in most instances, the least possible de- 
grees of « ascent in the laying out new Roads ; however much this 
may occasion the hei wears of the ascents, it will be the better 
I think: let the objectors be referred to the example of a well- 
contrived Rail-way, as the only argument likely to prevail with 
such Persons. I beg to call the attention of my friend Mr. Tred- 
gold (the author of the first Paper of the present volume) to the 
begiming and concluding parts of Mr. Meikle’s ingenious Letter, 
And I am, yours, &e. 
Howland-street, Apri! 2 » 1849. J. Farey Sen. 
~ P. SI beg the favour of Scepticus, in p. 202 of your last 
Namber (after consulting his Cyclopedia, in order to gain some 
idea of the important distinctions there are, between real and ap- 
parent Motions) that he will read my Papers in Mr. Nicholson’s 
Journal, which are referred to in the page on which he has eom- 
mented: it would be too much, for me to request of you, to re- 
print matters, already on the imperishable records of science. 
fi: NBiied} Lab vecubit wal Béoks. 
A Voyage of Discovery made under the Orders of the Admiralty, 
in H. M. Ships Isabella and Alexander, for the Purpose of 
exploring Baffin’s- Bay, and inquiring into the Probability of 
a North-west Passage. By John ers, K.S. Capt. R.N. 4to. 
With 32 coloured Plates, Maps, &c. 
Ovr readers have already been made acquainted with several 
particulars respecting this voyage, in our preceding numbers and 
through the medium of the daily newspapers: they will not, 
however, be displeased that a few of the most promiuent parti- 
culars should yet have a place in our pages. On the voyage, ge- 
nerally, we may observe that it serves to confirm, in ali the lead- 
ing features, the accuracy of the observations of the voyager from 
whom the sea exvlored by Capt. Ross has its name; but which 
had by many heen consigned to a place among the records of 
fiction. So far this voyage has been useful ; and we have only 
to 
