I speak this from long experience, from the many observations I have made, and the good success that have attended my improvements, when it has been in my power to put them in execution. I have many things to offer with respect to provisions at sea; but as that is too extensive to be inserted in this volume, I shall treat of it distinctly. In the mean time give me leave to close these lectures: and being conscious that truth and utility has guided my endeavours through the whole, I lay down my pen for this time, with the pleasing reflection, that I have advanced one step farther in the performance of my duty, and in answering the end of my existence. FINIS. ------------------------------------------------------------------------ [Illustration: Medical Instruments.] EXPLANATION OF THE PLATE. _Fig. 1._ A common bleeding lancet. A. The blade; which, when it is wiped after bleeding, should always be laid upon the handle B. and wiped but one way, to save the point. _Fig. 2._ An incision lancet. A. The point of the blade, which ought to incline one way most, in order to make it the better fit for opening of aposthumes. _Fig. 3._ A bistoury for opening of sores, &c. in general use. A. The blade. B. The handle in which the blade folds. _Fig. 4._ A pair of strong scissars. _Fig. 5._ A spatula. A. The part for spreading of plaisters. B. The part for pressing down the tongue; for which reason it is made full of holes that it may the better press down the tongue. _Fig. 6._ A probe. A. the probe. B. A triangular point on which lint may be wrapped to wipe the sore with, as it is easy taken off again. _Fig. 7._ A arm tied up for bleeding, with the three veins as they generally appear when swelled up. _Fig. 8._ A vein of a kind of three orifices. A. Is a longitudinal orifice, which will not let the blood run freely. B. Transverse; in making such orifice the vein is apt to be divided; besides it is not very easily stopped, and will not admit of an orifice large enough to let the blood run out with freedom. C. An oblique opening, the medium between the two former; and always the best orifice. _Fig. 9._ A key-tooth instrument. A. The handle, made of ivory. B. The comb of the instrument, which should be wrapped round with a little rag, and is that part which rests against the jaw bone. C. The hook which is brought over the tooth. D. The screw at the end of the key, by which the hook is shifted as occasion requires. E. The screw by which the handle is fixed to the instrument. _Fig. 10._ Common splints used for fractures; these splints are made of thin boards of pine or cedar, glewed on to leather, and then ridged so, that they may easily bend and suit to the limb which they are applied to. _Fig. 11._ A single headed rowler, or bandage, this bandage is generally used for a fractured arm or leg.