APPENDIX,

Having mentioned to Sir John Sinclair, an idea I ad long entertained, that vegetables dried on a kiln mighe be rendered uſeful to ſailors in long voyagés, He di reed me to procure ſome potatoes, and dry themon his‘account: I accordingly purchaſed four ſacks, which I dried on a common hop-oaſt, and ſent them

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to him in March laſt, with the account in a letters as under,

SIR,

IN two matted parcels, by the Endeavour Sandwich Hoy, I have ſent you the produce of four ſacks of pota=- toes, after being kiln dried.

The expence and weight of them, before and after drying, are incloſed,

I got the potatoes pared, and haye dried the whole, that you IAy See te eflecE and try what experiments with them you may think proper; and I have had twenty=- eight pounds of the white ſort ground; the meal of which 1s ſent in the parcel to which it belongs,

I think the expence of drying would have been leſs, if the quantity had been greater, becauſe the oaſt-cloth was not ſufficiently covered to prevent the heat eſcaping too faſt. I found it very difficult to get the thermometer up to 104. On account of the ſmall quantity to dry, I uſed my leaſt kiln, which is an oven-oaft; by which the colour of the potatoes is more ycllow than it would have been if dried on a cockle,

I beg leave to recommend to you to ſend a ſmall caſk of them a long ſea voyage, to be returned to you, that you may ſee how they keep, and what uſe may be made

of them on their return. I have long been of the opinion O 2- that

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