Microscopically, the urine is found to contain, in addition to its usual elements, immense numbers of molecular particles easily soluble in ether, and therefore fatty in their composition. It may be rendered perfectly clear by the addition of ether, and again approximately milky after evaporating the ether and shaking the residue; but now the microscope shows the oil in the shape of oil-drops and not molecules. Oil-drops are also sometimes sparsely present in the fresh fluid, but the fatty particle is commonly molecular. Indeed, the molecules are commonly so small that an {115} aggregated mass of them appears like a delicate cloud under the microscope, rather than a collection of individual particles. Blood-corpuscles may also be present, sometimes in sufficient quantity to produce a distinct pink coloration, but no unusual proportion of leucocytes is common. The pink tinge, and even an almost bloody appearance, is very apt to precede the chyluria. This bloody character sometimes gradually increases until the chyluria has become a hæmaturia, so that we have sometimes a chyluria spoken of as a first stage of hæmaturia. Tube-casts do not occur. Chyluria is seldom constant, and a specimen of urine passed a couple of hours after one white as milk may be, again, perfectly clear and in all respects natural. Thus, a second specimen, passed by the same patient as that of which the analysis is given above, was almost clear. It had a specific gravity of 1010 and a slightly acid reaction, and contained a mere trace of deposit, consisting of a little epithelium, a few cells larger than lymph-corpuscles, and a few small cells, probably minute fungi. Not the slightest precipitate was produced by the application of heat or addition of nitric acid. The following is Beale's analysis: Water . . . . . . . . . . . . . . . . . . . . . . . . . . . 978.8 Solid matter . . . . . . . . . . . . . . . . . . . . . . . 21.2 ----- Urea . . . . . . . . . . . . . . . . . . . . . . . . . . 6.95 Albumen . . . . . . . . . . . . . . . . . . . . . . . . . 0.00 Uric acid . . . . . . . . . . . . . . . . . . . . . . . . .15 Extractive matters with uric acid . . . . . . . . . . . . 7.31 Fat insoluble in hot and cold alcohol, but soluble in ether| Fat insoluble in cold alcohol . . . . . . . . . . . . . . | .00 Fat soluble in cold alcohol . . . . . . . . . . . . . . . | Alkaline sulphates and chlorides . . . . . . . . . . . . 5.34 Alkaline phosphates . . . . . . . . . . . . . . . . . . . 1.45 Earthy phosphates . . . . . . . . . . . . . . . . . . . . .15