Bag of unknown materia medica, sent by J.B.N.Hennessey, India to Prof. Fraser, 1895 Bag of unknown materia medica
Three-prism solar spectroscope with automatic prism adjustment for minimum deviation and a fixed equatorial mounting with drive by Howard Grubb, Dublin, dated 1871. Supplied by the Royal Society of London to J.B.N.Hennessey who used the instrument at Vincent Hill, Dehra Dun in the Indian foothills [7,000 ft.] of the Himalayas to map the solar spectrum between 1871-5. Solar spectroscope by Howard Grubb, Dublin, 1871