/ 
'• 1 1 Hi 
THE TOI 
1TATES 
Ilia United States Geological Survey is making a, standard 
igraphie atlas of the United States. This work has been inj 
ress since 1882, and its results consist of'published maps of 
e ban 40 per cent of the country, .exclusive of ou> lyiaf 
I 
10S81O118L 
I 
his topographic- atlas is published in. the form ot maps oil 
meets measuri h r about 161 by 20 inches. T a lei tbs 
[ ; do ed ;r ; ed t - cm. mimle - 
| i . 5 9 .' at-' 1 * 3 - - O' 5 i-td M ■' " Ol'gi d 
?se 'Quadrangles are mapped, on abife’ent ecttieBj the scnij 
.( ted for any quadrangle depending on its nature, and its 
a > ( |i ] " ! •••'!:i - tbougd V 
'tp d J ,mm .wufkoi -me du>.y re-:i.e-;t-u« 
| 
nted graphic scales showing dista nees in' feet, meters, a id 
I i shown by ■ . a- 
- 
f.'- '.ee; erprce.'flng ' r:-tUo her.VCeii ■ ’ <^| 
' 
I 1 For -‘| .0 safe ~ meant jtha 1 tulle '§■ 
map (such as 1 inch, 1 fool or l meter) represents 02,o®I 
I 1 
... • Ov.'.d a>. M'-e UrilM' OiW Li i L I: hi SOS | 
traction Quadrangles in thickly settled or induj 
_ 
ill 4 11' "U;; iff HUS a Vi .1 ' - •’ r 'i-- r i; " ' 
ted by a few shallow gullies. On the map each of th 
'ires is represented, directly beneath its position in 
jh, by contour lines. 
tie contour interval, or the vertical distance in feet betwi 
■onfconr and the next, i- stated, at the boiiom. of eaca m| 
s I interval diiters according to the topography of the : 
lad, ii y i". a a u ; Try it rn-v re m -.v.oJt mi ! > >t. 
in miaous region may be as great a- 2b! '-a a err 
Jnur lines, every fourth or fifth one. are made heavier •: 
Kt-hers ami are accompanied by figures di owing- ahitu 
3 j] i . : • reil t; — - !'■ - a a.; n a ■■' a ■ ■ \ 
Bees of nkfy and bench maths—ere ;f-m giver: on the n 
fti i'ps. which show altitudes to the iiearmt foot only, of 
Rahitaues—those of beard marks—ns voOi as llie good, 
pmaies of trhmgukcion static us, are gahitsLed in ballet 
ire issued free by the Geological Survey* 
Re letter in- and works ot inae aw* *]vovu -a-, a an 
O 
m-, such as odo-c af n bode, ooro i. ga i 
•ship, or reservation, are shown by continuous or. broi 
K i 
Rouble lines, one of which i- tu-cemaaUd. ’ti't-r [ 
1m ; gre sliU-VT'; by u:.'- ti<v- ; - I" bit t 1 '• • 
flaelied double lines, toils by dashed sir rie lines* 
