AUTHOR OF "SULPHUR AS A REMEDY IN EPIDEMIC CHOLERA."

LONDON:

JAMES RIDGWAY, PICCADILLY.

MDCCCL.

"The tendencies of the mind, the turn of thought of whole ages, have frequently depended on prevailing diseases; for nothing exercises a more potent influence over man, either in disposing him to calmness and submission, or in kindling in him the wildest passions, than the proximity of inevitable and universal danger."—Hecker's Epidemics of the Middle Ages.

"The grand field of investigation lies immediately before us; we are trampling every hour upon things which to the ignorant seem nothing but dirt, but to the curious are precious as gold."—Sewell on the Cultivation of the Intellect.

TO