1.Scientific Dialogues intended for the Instruction and Entertainment of Young People: in which the First Principles of Natural and Experimental Philosophy are Fully Explained. Volume II Astronomy by the Rev. J Joyce. New revised edition. Published by Baldwin Cradock & Joy London 1825. In original marbled boards and leather spine size 14 by 9 cm. 252 pages plus another 4 pp of plates engraved by Lowry. Contents include the stars the seasons time tides planets (up to and including the Herschel planet) and comets. Fascinating. Signature in ink to top of title page dated 1826. Some scuffing to head and foot of spine to corners and a crease to both boards. Otherwise Good condition. 2.Scientific Dialogues intended for the Instruction and Entertainment of Young People: in which the first principles of Natural and Experimental Philosophy are Fully Explained. Volume III Hydrostatics by the Rev. J Joyce. New revised edition. Published by Baldwin Cradock & Joy London 1825. In original marbled boards and leather spine size 14 by 9 cm. 236 p plus 4 pp of plates engraved by Lowry. Minor loss to foot of spine. Signature in ink to top of title page dated 1826. Good condition. 3.Scientific Dialogues intended for the Instruction and Entertainment of Young People: in which the first principles of Natural and Experimental Philosophy are Fully Explained. New revised edition. Volume V Optics and Magnetism by the Rev. J Joyce published by Baldwin Cradock & Joy London 1825. In original marbled boards and leather spine size 14 by 9 cm. 252 pp plus 6 pp of plates engraved by Skelton. Scuffing to head and foot of spine. Signature in ink to title page dated 1826. Good to Good condition