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Table 1 Compilation of estimated values of the hydrostatic pressure Pw based on equations ( 1 )

From: Stability of the volume of air trapped on the abdomen of the water spider Argyroneta aquatica

2 r[μm]	θ_e= 130^ο	θ_e= 160^ο
	[cm water column]	[cm water column]
5	372	545
10	186	272
20	193	136
50	37	54
80	23	34
100	19	22

The hydrostatic pressure P ^w is expressed in units of the corresponding length [cm] of a water column. θ_e: contact angle. 2 r, parameter characterising the structure of the layer of hydrophobic hair covering the abdomen of the spider.

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