Recognized HTML document

Transition Studies

57

run in equal times. Thus a suitable name would have been 'hodogram' had not something like that word been already appropriated in another and rather unfitting sense by Sir William Hamilton. Galton in his third paper, published in the Royal Society Proceedings', and entitled : "On the Employment of Meteorological Statistics in determining the. best course for a

8 Hourly Isodic Curves in Square 3, January
The direction and amount of the Current is strewn, and its cfli!et is included inthe isod-.

 

30'W   28°   26'   24'   22'   W 20'

W

Id'`.jIE9!CUM...D.IRl.,..N.16°E   .,R •CUR! DIRT N.4TW,'   ST CUR' DIRT S76'W~"

..   'H'RATE0-IM:'   NeRATEOZw   HO RATE 0-1 )T'

   '$ES!CURT DIRT N.BdW,`

RORATE03M"

'ftST00RT_DNR.is,63W,z

N:°RAT0.11y'

loN

       

%8.

 

'.RESTCURT DIR! S.81.:'RES!CUR

N.'RATE02M

" N.86:W:

WRATED3M.

REST CURT DIP! 5.14: W:

RI' RATE O2'M.

'R S?CUR' DIRT S.16:W

PRATE0;18.

"REST CURT. DIRT N.57.'E:''

RSTRATEOIM:

4

~A S CUR' DIRT $.16'5.'

R4 RATE LESS

THAN {p"M.

REST CUR' DIRT N.89!W.

NVRATEO'SM.

-REST CURT SIR-S.39:E:

NITRATCO'SM

"RESTCURT DIRT S.45'E:'

HI, RATE 0:0

'•FESTCURT .DNITN.62:E,

R4RATE0446

`   ,

 
 

'.RES! CURT DIRT N.57!W,%

NITRATE 06IY

REST CURT DIRT N:591*."

N4 RATE 0.414.

   'REST CURT DIRT N.73.V{:''

N!+ RATE 0.4•M

REST CUR! DIRT N.68TWC'

NITRATE 0,4M

REST CUR' DIRTN.SI.V1,"

R\TRATE 0-3M.

 
 

'REST CURT..DIRT N.7S:W,,"

'\   NSTRATE0$.M.

REST CURT DIRT N.74'W:'

Ilk, RATE 09M.

40

   'RESTCURT DIRT N.R61W:

N!TDATES-LM

`RESTCURT DIRTN.6eTW.

NVRATEQRM

`REST CURT DIRTN.72TYY-''

MSTRATEOUR.

'..IO

 

30.W   28'   26°   24   22'   26w.

Note: REST CURT . RESULTANT CURRENT.

Specimen of Galton's Isodic Curves from Minutes of Meteorological Council, 1872.

ship whose sailing qualities are known," terms these hodograms "isochronous curves" or simply "isochrones." The discussion of the construction of isochrones, if somewhat fuller, follows here the lines of that in the Meteorological Council Minutes. A new feature is the description of a somewhat elaborate

' Vol. xxi, pp. 263-74, April 1873.

PGII

8