| Title | Poster advertising Mr H O'Connell's popular lectures on astronomy to be given on 3 April and 4 April 1844 where he will discuss the wonders of the heavens using an orrery, the earth's motion in its orbit, the sun proven to be a globe of fire, eclipses causes described, twelve signs of the zodiac, diorama or series of dissolving views, an aerial machine, transparencies illustrated by oxy-hydrogen light with both evenings to conclude with a demonstration of the amusing and highly interesting effects of laughing gas [Part of DDX1942/1] |