1808.] 
pense depends principally on the number 
of hills and bridges, distance of materials, 
breadth of the road, and price of labour : 
and 5th, That the general adoption of 
broad wheels for the transportation of 
heavy loads, is necessary to the full en- 
Joyment of the advantages expected from 
the most substantial artificial roads. On 
the degree of convexity and on the pro- 
per shape to he given to the natural bed 
of the road under the artificial stratum, a 
diversity of opinions seems to prevail. 
Recapitulation and Resources. 
The improvements which have been 
respectfully suggested as most important, 
in order to facilitate the communication 
between the great geographical divisions 
of the United. States, will now be reca- 
pitulated ; and their expense compared 
with the resources applicable to that ob- 
ect. ) 
; I. From north to south, in a direction 
parallel to the sea coast : Dollars. 
1. Canals opening an 
inland navigation 
for sea vessels from 
Massachusetts to 
North Carolina,be- 
ing morethan two 
thirds of the Atlan- 
tic sea-coast of 
the United States, 
and across all the 
principal capes, 
cape Fear except- 
_ed,> = = 3,000,000 
3, A great turnpike 
road from Maine to 
Georgia, along the 
whole extent of the 
Atlantic seacoast, 4,800,000 
7,800,000 
II, From. east to 
west, forming com- 
munications across 
the mountains be- 
‘tween the Atlantic 
and western rivers : 
1. Improvement of 
the navigation of 
four great Atlantic 
rivers, including ca- 
nals parallel to 
them, - 1,500,000 
2. Four first rate 
turnpike roadsfrom 
those rivers across 
the mountains, to 
the four correspon- 
ding western ri- 
vers, - 
$. Canal around the 
falls of the Ohio, 300,000 
2,800,000 
Dr. Beddoes’ Essays on Health. 
345 
Brought forward 7,800,000 
4, Improvement. df ‘ 
roads to Detroit, 
St. Louis and New 
Orleans, - 200,000 
4,800,000 
III. Ina northern 
and north westward- 
ly direction, forming 
inland navigations 
between the. At- 
lantic sea-coast, and 
the great lakes 
and the St. Laue 
Tence; ‘ 
1. Inland navigation 
between the North 
river and lake 
Champlain, - 800,000 
2. Great inland na- 
vigation opening 
the whole way by 
canals, from the 
North river to lake 
Ontario, - 
3. Canal around the 
falls and rapids of 
Niagara, opening a 
sloop - navigation 
from lake Ontario , 
to the upper lakes, 
as far as the ex- 
tremities of lake 
Michigan, = - 
2,200,000 
1,000,000 
4,000,000 
Making together, - 16,600,000 
a 
Lo the Editor of the Monthly Magazine. 
SIR, ! 
LLOW me, throngh the Monthly 
Magazine, to reply to various en- 
quiries ; that I do not mean to publish a 
new edition of Hygeia, or Essuys on 
Health. A totally new work will be 
substituted in the place of such an edie 
tion; in that I shall endeavour to point 
out what men ought to do, and what 
they ought to shun, in order to secure 
the sound mind in the sound body; as 
also what it is their interest to feel and 
think concerning our profession, My 
hope is to contribute to domestic wel- 
fare, and also towards the extirpation of 
that part of the routine which degrades 
and oppresses the most important of hu- 
man arts. I have neither wanted oppor= 
tunities of instruction, nor the inclina- 
tion to profit by them. I have neglect- 
ed no means of correcting or enlarging 
my own experience, which I may presuine 
to have been more valuable for having 
pet on foot, and for years superintended, 
an 
