Rick Isaacs describes devices which lighten tracker actions which might otherwise be heavy because of large valves and heavy windflow in large organs, higher pressures, etc. He discusses the Kowalyshyn Servo-Pneumatic Lever which follows the motion of the finger in opening the note valve of a slider windchest. Developed at the Fisk firm, the device is used in larger Fisk organs and is available to other builders. |
Barbara Owen lectures on the organs created by the brothers Elias and George G. Hook as perhaps the most artistically successful of 19th-century American organbuilders. |