which form the opposite Walls of Cross-veins. 451 
simple intersection of that vein, and heaves in the other twos 
all which results are opposed to the facts. 
Now an elevation on a line which might dip northwards 
about 87° from the horizon, would, by an equal extent of mo- 
tion (about 34 feet in both cases), occasion a heave of 30 feet 
in the elvan-course, and one of 9 feet in the north lode, both 
of which accord with observation. When, however, we apply 
the same extent and direction of motion to the south lode, the 
discordance between fact and theory becomes most obvious, 
- and is shown below :— 
Depth. Calculated dist. Observed dist. 
Be resent ots Nopeiia.'s. > BA feats ee... SB Olfeet 
GO) oa cle aes, Ute), EAogar! als) Vie), one Bi ees 
ODay) aise Sars Re AD yree os DVVUBOl wes 
DLO) cee rete at. WL Qh tate 5) Biises 
The failure of this attempt at theoretical explanation can 
scarcely be rendered more striking. 
(G.) At Polladras Downs all the lodes dip N.:—the Bor 
lode, 56°—80°; Bissa lode, 50°—82°; Pressure north lode, 
56°—74° ; Pressure south lode, 56°—82°; and Richards’s lode, 
79°—76°. The flucan heaves them all towards the right- 
hand (0). 
The inclination of a line on which a given extent of motion 
will produce the greatest number of results approximating to 
the observed facts, is about 85° towards the south (from the 
horizon); and the extent of the motion required is about 17 
or 18 fathoms. The differences between the calculated and 
observed distances of the heaves are as follow :— 
Depths. Calculated dist. Observed dist. 
Richards’s lode. . . 13 fms. ... . 42 feet... . 42 feet. 
Pressure S. lode . . 33 we «2 os AZ ove so we AZ one 
/ PTA re ete net CUO AE costs Lele bem tat wae 
oan Pee Oh tee en ae ee eth ace neal stae cli cis. wae 
ods PERLE ee Pecaeee eter OU) ssc speneset Eoiveas 
Pressure N. lode. . 33° see's 2 oo 45 oe wo ow 2H one 
doa nist OG. laud lela tule x RO> leon we ete TS eve 
Bissa lode Fe VB ete cokalia: pein Ais Leseuiclie wera ere 
Bor lode ete poe SSeiLae atl, eon eels os EBS, 
yr Hi dil. BBA ci de tle WADI oaellare. PIM. TPQ ss 
dae S acflt, OS. TeessO kel MOD Wilda oc vere LS tee 
oe S ILO Rckeie etek OS ees atthe eat wes 
Thus, of 12 heaves, the assumed motions coincide in 3 
instances, and differ from the observed results in the remain- 
ing 9. 
If, on the other hand, preserving the direction of the mo- 
ort 2 
