« ForrigeFortsett »
Siderial Distance from NorthSiderial| Distance from N. Hours.
above the Pote. Hours. below the Pole. 12112
3 11012 i 156 48
3 1. 2 20
*2 9 2 42
2 9 4
2 10 I 46
27 15 oo
The Names of such Colours as are necef!
sary for the Washing of Maps, Charts,
I is not convenient for a Surveyor
when he hath drawn the dranght of a Mannor, and reduced it to his intended bigness, to repair to a Painter to finish his work, the thing itself being very commen: dable, and easie to be attained : And besides a Painter is not to be found in-every Country, nor is every Painter furnished with Colours fitting for such a purpose, they for the most part using more gross and ordinary Colours. Now for the benefit of sich who desire to exercise themselves in this kind of practice, I have added these neceffary directions following.
How to make Gum-Water,
Take Gum Arabick what quantity you please, of the whiteft and clearest you can gel, which bruise into small pieces, and tie them up loosely in a fine linnen Rag, then take of the clearest Water you can get, and put it into a clean velel, as a poringer, (or such like) then hang your Cloath in which
you put your Gum into this Water, letting it hang till all the Gum be diffolved, then when you put your fingers into this Water, if you find them to stick together, as if they were glewed, your Water is too ftiff of the Gum, - which you may remedy by putting thereto
more fair Water, and if you find it too weak, you may add more Gum; with this Water most Colours are to be tempered.
Take a Pound of Allum, and beat it to Powder, then take a Gallon of clean Water, and set it on a Fire, letting it boil till all the Allum be melted, then take it off the Fire, and when it is cold you may put it into a Vessel and keep it for your use : With this Water, if you wet your Paper before you lay on your Colours, it will keep them from finking into the Paper, and will also add a Luftre and Beauty to the Colours laid there
The Names of suchColours às are necessary for the
Washing of Maps, Plots, or Charts.