The mariners magazine, or, Sturmy's mathematical and practical arts containing the description and use of the scale of scales, it being a mathematical ruler, that resolves most mathematical conclusions, and likewise the making and use of the crostaff, quadrant, and the quadrat, nocturnals, and other most useful instruments for all artists and navigators : the art of navigation, resolved geometrically, instrumentally, and by calculation, and by that late excellent invention of logarithms, in the three principal kinds of sailing : with new tables of the longitude and latitude of the most eminent places ... : together with a discourse of the practick part of navigation ..., a new way of surveying land ..., the art of gauging all sorts of vessels ..., the art of dialling by a gnomical scale ... : whereunto is annexed, an abridgment of the penalties and forfeitures, by acts of parliaments appointed, relating to the customs and navigation : also a compendium of fortification, both geometrically and instrumentally / by Capt. Samuel Sturmy.

About this Item

Title

Author

Sturmy, Samuel, 1633-1669.

Publication

London :: Printed by E. Cotes for G. Hurlock, W. Fisher, E. Thomas, and D. Page ...,

1669.

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Link to this Item

http://name.umdl.umich.edu/A61915.0001.001

Cite this Item

"The mariners magazine, or, Sturmy's mathematical and practical arts containing the description and use of the scale of scales, it being a mathematical ruler, that resolves most mathematical conclusions, and likewise the making and use of the crostaff, quadrant, and the quadrat, nocturnals, and other most useful instruments for all artists and navigators : the art of navigation, resolved geometrically, instrumentally, and by calculation, and by that late excellent invention of logarithms, in the three principal kinds of sailing : with new tables of the longitude and latitude of the most eminent places ... : together with a discourse of the practick part of navigation ..., a new way of surveying land ..., the art of gauging all sorts of vessels ..., the art of dialling by a gnomical scale ... : whereunto is annexed, an abridgment of the penalties and forfeitures, by acts of parliaments appointed, relating to the customs and navigation : also a compendium of fortification, both geometrically and instrumentally / by Capt. Samuel Sturmy." In the digital collection Early English Books Online 2. https://name.umdl.umich.edu/A61915.0001.001. University of Michigan Library Digital Collections. Accessed June 15, 2024.

Pages

SECT. II. How to fit and prepare Granadoes for the Mortar-Piece.

THe Shot of great Mortar-Pieces are most commonly one tenth part lower than the Bore, because of Cording them, to sling into the Mouth of the Piece; and for fear of secret Cracks, which cannot be easily espyed, they are coated with Pitch, so that being fitted and prepared, they do but just fit the Bore.

How to make Fuses.

Every Ball hath an hole left to put in a Fuse, or piece of Wood, just like a Faucet for a Spiggot; this hole must be just one quarter of the Diameter of the wooden Fuse, which Fuse must be in length three quarters of the height of the Granadoe; make it taper, and then filled with composition, and driven gently into the Powder that is in the Ball, leaving a little of it without: the Composition of this Fuse is made thus; take one Pound of Powder, four Ounces of Salt-Peter, and one of Brimstone, first beaten to Powder, and sifted in a Sieve severally, these Ingredients being mixt together, your Composition is fit for use.