USEFUL PROJECTS. 



497 



In a short time the sheets of 

 lead become charged with a coat 

 of carbonate. If their entire con- 

 version into carbonate at a single 

 operation is not intended, they are 

 withdrawn from the case, and sus- 

 pended in water ; the white lead 

 readily detaches itself, and falls to 

 the bottom. If the sheets are left 

 till wholly converted into carbo- 

 nate, still they must be put in 

 water ; and, besides, the deposit 

 xnust be levigated to separate the 

 metallic particles which may have 

 escaped oxidation, and which would 

 tarnish the white colour. 



On Bread made from a Mixture of 



Wheat Flour, and Potatoes. By 



H. B. Way, Esq. 



Sir ; — I have sent to the Society 

 of Arts, &c. a loaf of bread made 

 from a mixture of wheat-flour and 

 potatoes. The principle I have 

 adopted from a publication of Ed- 

 lin's, and I have now got it in 

 such perfection, that I and ray fa- 

 mily prefer it to bread made 

 wholly of wheat-flour. It has the 

 valuable property of keeping many 

 days longer in a moist state, which, 

 in the country, where it is impossi- 

 ble to get fresh bread or yeast 

 every day, and where persons can 

 perhaps only conveniently bake 

 once a fortnight, is a very great 

 advantage. I had many prejudices 

 to encounter in the first attempts 

 I made, and I think great merit is 

 due to my servant, Hannah Peters, 

 for her perseverance and success 

 both in the making of it, and ma- 

 nagement of my oven in baking it, 

 as both she and my neighbours 

 were originally much prejudiced 

 against my experiments in this 

 line. I annex, for the Society's 



Vol. LV, 



inspection, a statement of the cost 

 and saving by the use of potatoes, 

 and I hope, by degrees, this me- 

 thod will be extensively practised. 

 I am sure, if the subject is noticed 

 in the Society's volume, it will 

 greatly contribute thereto. This is 

 the second year that I [have con- 

 stantly used this mixed bread from 

 the latter end of October to the 

 latter end of May ; and I assure 

 you, that it is a matter of great re- 

 gret to my whole family, when, 

 from the scarcity of potatoes, we 

 commence the use of bread made 

 wholly from wheat. 



I am very respectfully. 

 Dear Sir, 

 Your obedient humble servant, 

 H. B. Way. 

 Bridport Harbour, 

 March 10, 1812. 

 To C. Taylor, M.D.Sec. 



Process for making Bread from 

 Potatoes and Wlieat Flour, as 

 practised under the direction of 

 H. B. Way, Esq. March 1 0, 1 8 1 2. 



Sixteen pounds of potatoes were 

 washed, and when pared weighed 

 twelve pounds. After boiling they 

 weighed thirteen pounds, and were 

 then mixed, whilst warm, with 

 twenty-six pounds of flour : the 

 potatoes were bruised as fine as 

 possible, and half a pound of yeast 

 added. Four quarts of warm water 

 were added to the mixture of po- 

 tatoes, yeast and flour, and the 

 whole well kneaded together, and 

 left two hours to rise, and then 

 weighed forty six pounds and four 

 ounces. The whole made six loaves 

 and two cakes, which were baked 

 at two separate times, ii\ my iron 

 oven, each baking taking two 

 hours. The six loaves and two 

 cakes, the day after being baked, 



2 K 



