He mixed it with allyl sulphide and looked at it through the microscope.

He mixed allyl sulphide with the germ-ridden blood and nothing happened.

The allyl sulphide was absorbed, the germs still lived.

Is of pale color and penetrating odor, containing several allyl sulphides.

Again the book: " Allyl sulphide may be prepared by heating mustard oil and potassium sulphide at 100 degrees."