BOTANICAL NOTICES. 
153 
" Remarks on the Cost of Light from Magnesium, as Compared with other 
sources of Illumination, with an Account of some New Inflammable 
Explosive Compounds of Magnesium." Devonshire Association Trans- 
actions, 1865. 
"Some Experiments to determine the Rate of Magnetic Development in 
Iron whilst under the action of Electrical Currents." Devonshire 
Asssociation Transactions, 1866. 
"Review of Professor Tyndall's Recent Investigations concerning Sensitive 
Flames." Plymouth Institution Transactions, 1868. 
" Recent Earthquakes and Volcanic Eruptions." Ibid, 1869. 
" The Fulgurator. A New Arrangement of Leyden Jars for the Production 
of Electro Sparks of Enormous Length." Devonshire Association 
Transactions, 1870. 
"On the Degeneration of our Deep-Sea Fisheries." Devonshire Associa- 
tion Transactions, 1870. 
"Aurora Borealis." Plymouth Institution Transactions, 1871. 
"Electro Therapeutics." British Medical Association Transactions, 1871; 
Devonshire Association Transactions, 1872. 
" Guide to the Fishing of Plymouth and Neighbourhood." 
"Application of Cast Iron as a Substitute for Steel in the Construction of 
Permanent Magnets." 
" On the Comparative Power of Cylinder and Plate Electrical Machines." 
Plymouth Institution Transactions. 
" Treatise on Medical Magnetism." 
E. 0. 
BOTANICAL NOTICES. 
Habenaria viridis (Br.) grows somewhat sparingly on Smear Ridge, 
near Peter Tavy, flowering in July. I am not aware that it has 
been noticed before on the west side of Dartmoor; it has heen 
found at Sidbury by Miss Hunt ; at Chudleigh by the Eev. Gr. 
B. Warren ; and the Eev. J. F. Eavenshaw says, " Dartmoor." 
Orobanche amethystea (Thuil.), once tolerably plentiful at Tregantle, 
but destroyed during the formation of the new Ports, still lingers 
on the rocks under Plymouth Hoe : I have found a few plants 
during three successive summers. 
Convallaria m,ajalis (Linn.), as a truly wild plant, grows in 
considerable abundance in the woods under Shaugh Beacon. I 
believe it has not previously been recorded as a Devonshire plant, 
although plentiful in most gardens. 
Francis Brent. 
