The arch of the aorta passes a little to the right of the sternum and as high as the lower border of the first rib, then makes a turn to the left and goes directly back to the left side of the fifth dorsal vertebra. The superior vena cava lies a little to the right of the arch of the aorta. The advantage of inserting at this point rather than above the clavicle is that there are no vessels in the location in danger of perforation. If the trocar is inserted above the clavicle on either the right or the left side there is danger of perforating the subclavian artery or vein, while if the insertion is made next to the sternum, the aorta may be perforated, in either case breaking the circulation. Disease fluids are seldom found at the top or apexes of the lungs, but in consumption, breaking down of the lung substance usually begins at this point, especially in young cases. To insure a perfect embalming of the lungs, you should inject at the apexes, about a half-pint of strong formaldehyde on each side. It should, however, be remembered that the injection at the tops of the lungs, as suggested, gives no fluid to the lower parts of the lungs where it is often most necessary. It is not an unusual condition to find a whole lobe rotten and broken down at the base of the lung, and when such a diseased condition exists the lungs become firmly attached to the chest walls, and unless fluid is placed below these adhesions it does not reach the diseased parts. The intelligent embalmer, will never trust to the fluid passing from the tops of the lungs to the base, as in almost all cases the adhesions between the lungs and the walls absolutely prevent this taking place. It is necessary first to draw off by aspiration, at the bases of the lungs, the fluids which have accumulated and which may be either water, pus or blood. This is done by inserting a curved trocar of small size, between the fifth and sixth ribs on the axillary line. The thoracic cavity extends in the back as low as the last rib and the twelfth dorsal vertebra and it may be necessary to pass the trocar down into this part of the cavity in order to remove the fluids. As soon as the fluids are removed, inject from a pint to a quart of strong formaldehyde on either side. By so doing the gangrenous and decomposed part of the lung will be put to soak in the embalming fluid, which will insure perfect disinfection and an absence of bad odors.