5 Half Dollar Coins in a stack

Stacks of Half Dollars

5 Half Dollar Coins in a stack

6 Half Dollar Coins in a stack

Stacks of Half Dollars

6 Half Dollar Coins in a stack

7 Half Dollar Coins in a stack

Stacks of Half Dollars

7 Half Dollar Coins in a stack

8 Half Dollar Coins in a stack

Stacks of Half Dollars

8 Half Dollar Coins in a stack

9 Half Dollar Coins in a stack

Stacks of Half Dollars

9 Half Dollar Coins in a stack

10 Half Dollar Coins in a stack

Stacks of Half Dollars

10 Half Dollar Coins in a stack

Two young girls looking through a stack of magazines.

Magazine Pile

Two young girls looking through a stack of magazines.

2 Nickels in a stack

Stacks of Nickels

2 Nickels in a stack

3 Nickels in a stack

Stacks of Nickels

3 Nickels in a stack

4 Nickels in a stack

Stacks of Nickels

4 Nickels in a stack

5 Nickels in a stack

Stacks of Nickels

5 Nickels in a stack

6 Nickels in a stack

Stacks of Nickels

6 Nickels in a stack

7 Nickels in a stack

Stacks of Nickels

7 Nickels in a stack

8 Nickels in a stack

Stacks of Nickels

8 Nickels in a stack

9 Nickels in a stack

Stacks of Nickels

9 Nickels in a stack

10 Nickels in a stack

Stacks of Nickels

10 Nickels in a stack

2 Pennies in a stack

Stacks of Pennies

2 Pennies in a stack

3 Pennies in a stack

Stacks of Pennies

3 Pennies in a stack

4 Pennies in a stack

Stacks of Pennies

4 Pennies in a stack

5 Pennies in a stack

Stacks of Pennies

5 Pennies in a stack

6 Pennies in a stack

Stacks of Pennies

6 Pennies in a stack

7 Pennies in a stack

Stacks of Pennies

7 Pennies in a stack

8 Pennies in a stack

Stacks of Pennies

8 Pennies in a stack

9 Pennies in a stack

Stacks of Pennies

9 Pennies in a stack

10 Pennies in a stack

Stacks of Pennies

10 Pennies in a stack

A pile of books. One is open and must be about Abbeys and Castles.

Pile of Books

A pile of books. One is open and must be about Abbeys and Castles.

2 Quarters in a stack

Stacks of Quarters

2 Quarters in a stack

3 Quarters in a stack

Stacks of Quarters

3 Quarters in a stack

4 Quarters in a stack

Stacks of Quarters

4 Quarters in a stack

5 Quarters in a stack

Stacks of Quarters

5 Quarters in a stack

6 Quarters in a stack

Stacks of Quarters

6 Quarters in a stack

7 Quarters in a stack

Stacks of Quarters

7 Quarters in a stack

8 Quarters in a stack

Stacks of Quarters

8 Quarters in a stack

9 Quarters in a stack

Stacks of Quarters

9 Quarters in a stack

10 Quarters in a stack

Stacks of Quarters

10 Quarters in a stack

"Each even number of the front rank grasps his piece with the left hand at the upper band and rests the butt between his feet." — Moss, 1914

Stack arms

"Each even number of the front rank grasps his piece with the left hand at the upper band and rests…

"Each even number of the front rank grasps his piece with the left hand at the upper band and rests the butt between his feet." — Moss, 1914

Stack arms

"Each even number of the front rank grasps his piece with the left hand at the upper band and rests…

"Each odd number of the front rank raises his piece with the right hand, carries it well forward, barrel to the front; the left hand, guiding the stacking swivel." — Moss, 1914

Stack arms

"Each odd number of the front rank raises his piece with the right hand, carries it well forward, barrel…

"He then turns the barrel outward into the angle formed by the other two pieces and lowers the butt to the ground, to the right and against the toe of his right shoe." — Moss, 1914

Stack arms

"He then turns the barrel outward into the angle formed by the other two pieces and lowers the butt…

Illustration of similar triangles used to find height of smokestack.

Similar Triangles for Height of Smokestack

Illustration of similar triangles used to find height of smokestack.

A stool used to stack hay on so that it becomes ready faster then when it is stacked on the ground.

Young's Stack-Stool

A stool used to stack hay on so that it becomes ready faster then when it is stacked on the ground.