[88. McGill's Sand-crack Clamp]
[89. Koster's Sand-crack Clamp]
[91. Method of 'Easing' the Bearing of the Wall on the Shoe in the Treatment of Sand-crack]
[92. Method of 'Easing' the Bearing of the Wall on the Shoe in the Treatment of Sand-crack]
[93. Method of 'Easing' the Bearing of the Wall on the Shoe in the Treatment of Sand-crack]
[94 96. Grooving the Wall in the Treatment of Sand-crack]
[97. Removing the Wall in the Treatment of Sand-crack]