9th. In the case of a solid parallelolpiped overturned (subnormnal wave).
Here
$l={\frac {2}{3}}{\sqrt {\alpha ^{2}+\beta ^{2}}}$ 

therefore
$\mathrm {V} ^{2}={\frac {4}{3}}g\times {\sqrt {\alpha ^{2}+\beta ^{2}}}\times {\frac {1\cos \phi }{\cos ^{2}(\phi \pm e)}}$ 
(XVI.) 
the signs $+$ and $$ being attended to as before.^{[1]}
10th. In the case of a solid right cylinder overturned (subnormal wave)
.
In this case
$l={\frac {15\beta ^{2}+16\alpha ^{2}}{24{\sqrt {\alpha ^{2}+\beta ^{2}}}}}$ 

and
$\mathrm {V} ^{2}={\frac {g}{12}}\times {\frac {15\beta ^{2}+16\alpha ^{2}}{\sqrt {\alpha ^{2}+\beta ^{2}}}}\times {\frac {1\cos \phi }{\cos ^{2}(\phi \pm e)}}$ 
(XVII.) 
$+$ and $$ applying as before.
11th. In the case of a hollow parallelopiped overturned (subnormal wave)
.
Here, from Eq. VIII., XIII., and XIV., we have
$\mathrm {V} ^{2}={\frac {2g}{3}}\times {\frac {2\beta (\alpha ^{2}+\beta ^{2})+\gamma (2\alpha ^{2}+3\beta ^{2})}{(\beta +\gamma ){\sqrt {\alpha ^{2}+\beta ^{2}}}}}\times {\frac {1\cos \phi }{\cos ^{2}(\phi \pm e)}}$ 
(XVIII.) 
 ↑ Eq. XVI. has been applied in the text of Part II. under the form
$\mathrm {V} ^{2}={\frac {4}{3}}g\times {\frac {(\alpha ^{2}+\beta ^{2})^{\frac {3}{2}}}{(\alpha \cos e\pm \beta \sin e)^{2}}}\times (1\cos \phi )$ 
