t there are, are
infinite ruffians, ignorant, lying blackguards. There is no differential
calculus, no Taylor's theorem, no calculus of variations, &c. in
mathematics. There is no quackery whatever in mathematics; no % equal to
anything. What sheer ignorant blackguardism that!

"In mechanics the parallelogram of forces is quackery, and is dangerous;
for nothing is at rest, or in uniform, or in rectilinear motion, in the
universe. Variable motion is an essential property of matter. Laplace's
demonstration of the parallelogram of forces is a begging of the question;
and the attempts of them all to show that the difference of twenty minutes
between the sidereal and actual revolution of the earth round the sun
arises from the tugging of the Sun and Moon at the pot-belly of the earth,
without being sure even that the earth has a pot-belly at all, is perfect
quackery. The said difference arising from and demonstrating the revolution
of the Sun itself round some distant center."

In the letter to Lord Brougham we read as follows:

"I ask the Royal Society of London, I ask the Saxon crew of that crazy
hulk, where is the dogma of their philosophic god now?... When the Royal
Society of London, and the Academy of Sciences of Paris, shall have read
this memorandum, how will they appear? Like two cur dogs in the paws of the
noblest beast of the forest.... Just as this note was going to press, a
volume lately published by you was put into my hands, wherein you attempt
to defend the fluxions and _Principia_ of Newton. Man! what are you about?
You come forward now with your special pleading, and fraught with national
prejudice, to defend, like the philosopher Grassi,[593] the persecutor of
Galileo, principles {263} and reasoning which, unless you are actually
insane, or an ignorant quack in mathematics, you know are mathematically
false. What a moral lesson this for the students of the University of
London from its head! Man! demonstrate corollary 3, in this note, by the
lying dogma of Newton, or turn your thoughts to something you understand.

"WALSH IRELANDUS."

Mr. Walsh--honor to his memory--once had the consideration to save me
postage by addressing a pamphlet under cover to a Member of Parliament,
with an explanatory letter. In that letter he gives a candid opinion of
himself:

(1838.) "Mr. Walsh takes leave to send the enclosed corrected copy to Mr.
Hutton as one of the Council of the University of London, and to save
post