express any opinion.

JOHN LUBBOCK.
February 17, 1882.




PROFESSOR MAGNUS.


In reply to your enquiry respecting the use of tobacco and alcohol, I
shall be glad to give you all the information I possess on this
subject; though, of course, I am not in a position to judge whether my
few remarks will be of any service to you.

In the first place, as regards the influence of tobacco and alcohol
upon the health in general, it is clearly ascertained that under
certain circumstances, it may become highly injurious.

Apart from the disturbance produced in the whole nervous system, there
are serious diseases affecting certain organs of the body, which arise
solely from the abuse of both these stimulants. We note a serious
affection of the visual organs, which we plainly designate by the name
of: "Emblyopia ex abusu nicotiano et alcoholico." The symptoms of this
complaint consist chiefly in a gradual and steady decline of the power
of sight, coupled with partial colour blindness. I cannot here enter
into details as to the manner in which the range of sight is affected
as regards each of the different colours, and can only refer to the
characteristic weakening of the power to distinguish red from other