Abstract
Comparisons of shell thickness, specific gravity and shell strength (breaking strength and shell deformation under load) for individual loads have been made and correlation coefficients determined. The relationship between egg size, shell strength and shell deformation have been investigated. Shell strength has been correlated with shell thickness and specific gravity, but due to the complex nature of shell strength, it has been concluded that for routine work the measurement of shell thickness either indirectly or by specific gravity or by direct shell thickness measurement gives the most practical indication of shell quality.