76 O. N., Stoddard on the Brandon Tornado. 
To these sections we will now turn. Section II representsa 
survey across the path of the storm, one-fourth mile east of Bran- 
on, where it first struck the forest. The distances from bearing 
to bearing were not measured with a chain; it would have been 
impossible to use one in the midst of such a mass of fallen tim- 
ber. They were determined, as nearly as could be, by the eye. 
On the right of the dotted line, the number of bearings might 
have been increased to any extent, as the ground was covered 
with fallen trees. The largest and straightest trees were selected. 
Those which were partially decayed or which had been thrown 
down by others were rejected. The arrows do not in every in- 
stance represent the relative distances of the trees from each 
other; in many cases they lie side by side in contact. On the 
left of the dotted line, they are sometimes placed nearer in the 
plot than was actually their position. The direction is accurately 
given. The arrows with cross-bars point out trees which lay 
across others. ‘The prostrations appear to have been made almost 
entirely by the front of the tornado, with the exception of the 
left hand portion of the path, where the reverse action was fre- 
quently the most violent. This front action rendered the posi- 
tion of the trees more symmetrical, and the mode of action of the 
wind easier of solution. Objects thrown down at the first stroke 
of the current would accurately represent a tangent to the curve 
at that point, whatever the nature of the curve might be. As 
the trees which fell above others, must have been struck down 
after a part of the storm had passed, and cannot therefore exhibit 
the front action, they are on this account either rejected in obtain- 
ing the mean of the bearings, or included with others in the re- 
verse action. ‘The parallel lines were drawn to aid the eye in 
grouping the trees. Where the trees lie across them, they are il- 
cluded in that interval whose bearings most nearly correspond. 
A tabular view of Section If, one-fourth | A tabular view of Section IIT, six miles 
mile east of Brandon,—% mile wide. east of Brandon,—% mile wide. 
Course of the storm, N. 56}° ¥, lI group, -  -  N.56° 15’ E. 
1 group, - -. N.45° B BAe 5, So oy BU eee 
| ete - + WN. 34° @ es ee pe 
a“ =e Be oar Se oy ee ae 
: Seed - - N. 10° 7° W. See > - N. 10° W. 
5.8 + ae Ds elt 
es ees E. tO ot So ee ee 
ea + ecu pe? & $F oe ee 
Recs - - E. 459'S, G28 - ns W. 
G & - - B78? Sx Ba lommad : W. 45°98 
ay - - E. 679 §, te iB - = s. 
ts Pied : : - §. ie . ¥ 8, 22° 3s. 
Li © oy a eee 
. - - 8. 46° E. 

14 
‘The curtate cycloids were constructed to represent approxi- 
mately these tabular views. The radius of the generating circle” 
18 to that which describes the curve as 1; 2. The blanks in the — 
