"A" is for Atwater tie-up

Atwater tie-up. 

This tie-up is the one preferred by Mrs. Mary M. Atwater, whose text The Shuttle-Craft Book of American Hand-Weaving has been a standard for many years. 

This tie-up was and is stilled used for many drafts on a four shaft loom. Today's weavers call this the 'standard four shaft tie-up'. I was told an easy way to tell if the tie-up was for your jack loom was if there were "O's", and to think of them as balloons. "Tie-up the O's and the balloons will rise!"

For the sinking shed loom.

For the jack or rising shed loom.