Old Christmas the authors turn to a

the authors turn to a systematic study of the differential and integral calculus of vector and tensor functions of space and time

common practices and processes

cultural history

books on linear equations

" "Immovable Object

Old Christmas the authors turn to aWashington Irving's delightful account of a festive Christmas holiday includes five incomparable essays. Written well over a century ago, Irving's sketches "celebrate the celebration" with heartwarming descriptions of Yuletide events. Irving recalls with warmth and wonder his many colorful experiences of a traditional Victorian Christmas while a guest at an English estate from the Christmas Eve trip by a stagecoach filled with "rosy cheeked boys"