ring the
season.

"Persons wishing to attend this course will please call at
the lecturer's home at any time before next Tuesday in order
to enter the names on the list.

"Ladies are informed that the list of subscribers to their
course will not be closed until next Monday at twelve o'clock
at the hour the next lecture, properly the first of the
regular series, will be delivered. Gentlemen are not admitted
to these lectures."

In 1810 Dr. Rogers gave out a Syllabus of 12 octavo pages "On
Experimental Lectures on Natural Philosophy and Chemistry," in which
great emphasis was laid on the practical application of these
sciences. It also stated that "it is even esteemed, in some measure,
a cause of shame, for persons of respectable education, to be
ignorant of their general principles." In one newspaper announcement
Rogers said that in order to get sufficient space for his audience he
had procured the "use of the elegant and spacious ball room of M.
Guillou." In this special work he was repeating the labors of Sir
Humphrey Davy in London. In reality, Rogers and his contemporaries and
coadjutors were pioneer University Extension Lecturers. They sought to
popularize the natural and physical sciences and also broaden the
vision or outlook of their hearers. In the case of Cutbush there was a
strong desire to utilize chemistry in manufacture. This he emphasized
more strongly than any other lecturer.

Another participant in the science propaganda was Dr. Thomas P. Jones,
who devoted himself to Chemistry. The following notice of his lecture
course is not devoid of interest:

"On Saturday, the 13th inst., at seven o'clock in the
evening, at Dr. Jones' Chemical Lecture Room, S.W. Corner of
Fourth and Chestnut Streets, a lecture will be delivered on
the properties of nitrous oxide, or the exhilarating gas,
accompanied with a number of experiments. A large quantity
will be prepared to exhibit its effects when inhaled.

"Tickets at fifty cents each may be had at A. Finley's
Bookstore, S.E. Cor. of Chestnut and Fourth Streets, or at
the lecture room on the stated evening."

On perusing early chemical texts and advertisements, such as those
just given, attention is pointedly called to nitrous oxide, especially
to its exhilarating properties, for then it was "_laughing gas_!" One
Philip H. Nicklin published a brochure entitled

"THE ONLY GENTEEL WAY OF