Hawkins and Harvey, Rosenbaum and Sando, and Hawkins and Sando have used a modified Joly balance fitted with a puncturing needle to determine the force necessary to puncture the cells of the potato tuber, tomato, and certain smaller fruits. For the penetration of these tissues a relatively small force is necessary.
Proceedings of the Iowa Academy of Science
©1920 Iowa Academy of Science, Inc.
Rudnick, R. A. and Bakke, A. L.
"The Mechanical Penetration of the Sweet Corn Pericarp,"
Proceedings of the Iowa Academy of Science, 27(1), 129-132.
Available at: https://scholarworks.uni.edu/pias/vol27/iss1/16