In Smith, BB Taylor, S Williams, G (eds.). 77 Smith, JJ (2009) p. 154 n. 77 Haslam (2005) pp. seventy seven Swanton, M (1998) p. 226 n. 157 Swanton, M (1998) pp. 122, 226 n. 164 Williams, A (1999) p. 26 ch. 54, 106, 117, 122, 226 n. One of the main challenges with straightforward h2o clocks is that h2o will operate more rapidly or slower with various temperatures. By Christ I will.