BOILED ON FIXED OILS

a boiled on olive oil remains perfectly transparent, and the oil (at the bottom) unaffected.

b is rendered perfectly milky, with a notable diminution

* I hâve met with specimens which where sufBcîently alkaline to restore the colour to very slightly reddened litmus paper, but these could be distinguished by their physical characters alone.

of the quautity of oil introduced. After standing three hours it becarae again perfectly transparent.

At this stage neither of the specimens eommunicated any greasy stain to paper.

ADDITION OF STRONG SULPHURIC ACID.

a and h on the addition of equal quantifies of strong sulph. acid sutfered violent ébullition^ with great évolution of beat — becoming converted into an intensely chocolate-brown coloured liquid, with a peculiar smell.

In one experiment h was much paler coloured than a, forming a dirty brown liquid with brown flocculi.