With respect to the colour of the uniform, it ought to assimilate as much as possible to that of the surrounding objects. I would, therefore, recommend a green or grey jacket and trowsers, black belts, with a hat free from all those ornaments now in use, which serve to draw on the soldier the fire of the enemy. The present cap appears, indeed, but ill calculated for the Ceylon troops; as, in addition to the warmth that a large heated brass plate must naturally communicate to the head, all the lower part of the soldier's head and neck is entirely exposed to the sun and rain; and there being nothing to convey the water that falls on the cap over the cape of his jacket, it consequently runs down his back, and he finds himself wet to the skin long before it has penetrated his great coat. Thus circumstanced, he becomes cold and chilly, if not in continual motion; and when on duty at night, or without the means of procuring dry clothes, it must lay the foundation of many diseases, but particularly that known by the name of the jungle fever, which generally proved so fatal to our troops when serving in the interior. The glazed peak in front of the cap reflects the glare from the hot sand on the eyes, which for the time is unpleasant, and must in the end injure the sight. Some regiments adopted an entire glazed leather cap, which is assuredly much worse than the beaver, as it becomes in a short time infinitely more heated, and as soon as the soldier begins to perspire, the leather becomes moist, and attaches itself so closely to the head as to prevent all circulation of fresh air within; the confined air then, from the heat occasioned by the warm leather as well as that of the man's head, soon becomes many degrees warmer than the atmosphere. These caps were introduced in Ceylon a short time before I left it; and I always found that the sentries and soldiers, who were for any time exposed to the sun, complained of headaches, which they attributed to the cap. I can speak from my own experience, that even at a common field-day, though in the morning, before the sun became very powerful, I was regularly attacked by a violent headache, which generally continued during the remainder of the day; though, after a much longer exposure to the sun, even during the heat of the day (when in a round hat), I felt little inconvenience. Another disadvantage attending these caps is, that from the great trouble of cleaning them, the soldiers were in the habit, when out of sight of the officers, to take them from their heads, and carry them in a cloth, to prevent the varnish from being melted by the sun or injured by the rain; thus rather choosing to expose their bare heads to the weather than undergo the labour of repolishing them. White, from its being the greatest non-conductor of heat, is therefore best calculated for warm climates. The following extract from Dr. Franklin, on the subject of heat, may not perhaps prove uninteresting or useless:--