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48 Monday May 15th 1843 phosphoregenic emination under water Tried on saturday eving at the time of full moon to produce the phosphorous glow on sulphuret of lime by means of moon light, but I did not succeed. The experiment however was not decisive the lime may not have been in proper condition, although when I tried it this morning with the electrical discharge, it answered very well. Tried this morning a number of substances in reference to the transmissability by the phosogenic emination, among others the sulphate of potassiam a transparent salt, this gave a beautiful violet coloured light [[in margin]]Remarkable effect of sul pot[[/in margin]] as well as transmitted the influence to the lime below. The phosphoresence was more brilliant than with the lime but did not continue so long nor was it acted on at so great a distance. This is an interesting fact. Exposed the same substance, sulphate of potassa, to the direct light of the sun for a bout a minute, then removed it into the dark, found it phosphorescent but much less so than when exposed to the discharge of the Leyden Jar. I next discovered the remarkable fact that the phosphorescence of the sulphate of potash was produced as brilliantly under water, [[underlined]] ie [[/underlined]] when the substance was immersed in water, as when in the air. Tried the same experiment with the sulphat of lime, found the same result both with the sun light and that of the electrical discharge. When the sulphate of potassa is powdered, it gives a beautiful effect with the electrical discharge, more brilliant but less durable than the sulphuret of lime. [[end page]] [[start page]] Monday May 15th 1843 49 Made a series of experiments on different substances relative to their transmisability. The following is the result: [[Comment to the left of the following bracketed list]] Solids [[/End of Comment]] [[Comment to the right of the following bracketed list]] Powder under these Brilliant [[/End of Comment]] | Borax | | Sulphate of potassa | | sulphate of soda | | Citric acid | | Rochelle salt | [[strikethrough]]Hyposulphate of soda[[/strikethrough]] [[Comment to the right of the following bracketed list]] Powder dark under these [[/End of Comment]] Salt petre Tartaric acid Solids Hyposulfate of soda [[Comment to the right of the following bracketed list]] Powder light [[/End of Comment]] Trans Muriate of Barreta Solution ammonia (doubtful) [[Comment to the right of the following bracketed list]] Powder dark under these [[/End of Comment]] Muriatic acid Spirits of turpentine Trans Arceneous acid Solutions Ammonia Phosphoric acid