8. On the Structure of Rubies, Sapphires, Diamonds, and some 

 other Minerals, i plate. From Proc. Roy. Soc., No. 

 109, p. 291. 8vo. London, 1869. 



9. On some Remarkable Spectra of Compounds of Zirconia and 

 the Oxides of Uranium, i fig. Proc. Roy. Soc., No. 

 117, p. 197. 8vo. London, 1870. 



10. On some Compounds derived from the Colouring Matter of 

 the Blood. Quart. Journ. Mic. ScL, Vol. X., N.S., 

 p. 400. 8vo. London, 1870. 



n. On the Colouring Matters derived from the Decomposition 

 of some Minute Organisms. From Month. Mic. Journ., 

 May i, 1870, p. 229. 8vo. London, 1870. 



12 On the Various Tints of Autumnal Foliage. Quart. Journ. 

 Mic. Sti., 1871. 8vo. London, 1871. 



13. On the Colouring Matter of some Aphides. 2 figures. 

 Quart. Journ. Mic. Sri., Vol. XL, N.S., p. 352. 8vo. 



London, 1871. 



14. On the Examination of Mixed Colouring Matters with the 

 Spectrum Microscope. i cut. From Month. Mic. 

 Journ., Vol. VI., p. 124. 8vo. London, 1871. 



15. On the Colour of Leaves at Different Seasons of the Year. 

 Quart. Journ. Mic. Sti., Vol. XL, N.S., p. 215. 8vo. 



London, 1871. 



1 6. On Comparative Vegetable Chromatology. 2 figures. From 

 Proc. Roy. Soc., Vol. XXL, No. 146, p. 442. 8vo. 



London, 1873. 



17. On Impressed Limestone Pebbles, illustrating a new princi- 

 ple of Chemical Geology. i figure. Read before the 

 Cardiff Nat. Soc., March 20, 1873. 8vo. Cardiff, 1874. 



18. On a New Method of Measuring the Position of the Bands 

 in Spectra. i plate. Month. Mic. Journ., No. 

 LXXXIV., Dec. i, 1875. 8vo. London, 1875. 



