ON THE SUB+WEALDEN EXPLORATION. 21 
a little cymene formed, as above stated, by the further action of the phosphorus 
pentasulphide, and II. yielding on combustion carbon 86°55, hydrogen 12-81, 
agreeing more nearly with the formula C,,H,, than with C,,H,,, which requires 
carbon 88:24, hydrogen 11-76. 
The physical properties of the three oxidized bodies agree tolerably well 
with the previous determinations. 
The three specimens of citronellol are certainly not identical, for that with 
the lowest boiling-point rotated the polarized ray very strongly to the left. 
The intermediate one was without circular polarization, and that with the 
highest boiling-point showed a very little right-handed rotation. 
The experiments made so far appear to indicate that many of the consti- 
tuents of essential oils are closely related to the hydrocarbon cymene, this 
body being as it were the central form of matter from which terpenes and 
their derivatives of the forms C,,H,,O and C,,H,,O are all derived by various 
operations. As yet no reasonable prospect of success has appeared in the 
attempt to determine the different amounts of energy involved in those ope-- 
rations which yield isomeric products (e. g. in the operations whereby cymene 
is converted into camphor, myristicol, or absinthol, or into terebene, hespe- 
ridene, myristicene, &e.), one great difficulty in the way being the almost 
impossibility of obtaining absolutely pure homogeneous substances to operate 
upon. 
Second Report of the Sub-Wealden Exploration Committee, the Com- 
mittee consisting of Henry Witter, F.G.S., R. A. C. Gopwin- 
Austen, F.R.S., W. Torrey, F.G.S., T. Davipson, F.R.S., Prof. 
J. Prestwicn, F.R.S., Prof. Boyp Dawkins, F.R.S., and Henry 
Woonwarp, F.R.S. Drawn up by Henxy Wixert and W. Torey. 
Av the Meeting at Bradford the General Committee granted £25 in aid of the 
Sub-Wealden Exploration. 
In August 1873, 290 feet, at a diameter of 9 inches, had been bored ; and 
it was during the Bradford Meeting that Mr. Peyton, F.G.S., discovered 
Lingula ovalis in a core at the depth of 290 feet from the surface, indicating 
that at such a depth the boring was traversing Kimmeridge Clay. The slow 
rate of advance by the old system of boring was most disheartening ; and at a 
Committee Meeting held 7th November, 1873, a definite tender having been 
obtained from the Diamond Rock Boring Company, it was accepted. This 
Company forthwith energetically commenced, ably performed, and completed 
it to a depth of 1000 feet on June 18th, 1874, at a cost of over £1400 for the 
additional 700 feet. The funds being by this time exhausted, at a Committee 
Meeting it was considered by the Members to be very important that the 
work should not be abandoned, and a Subcommittee (consisting of Professor 
Ramsay, LL.D., F.R.S., Director-General of the Geological Survey of England, 
John Evans, Esq., F.R.S., President of the Geological Society, and Prof. 
Joseph Prestwich, F.R.S., Ex-President of the Geological Society) was ap- 
pointed to draw up a fresh appeal to the public for additional subscriptions ; 
and Mr. Willett was urged to continue in office as Honorary Secretary and 
Treasurer. An interview also for Professor Ramsay and Mr. Willett with the 
Chancellor of the Exchequer was obtained by the Secretary of the Treasury, 
at which a grant of the public money in aid of the prosecution of this enter- 
