9 Conclusions

1.

A larger dataset than earlier has been collected for two $\delta$Scuti stars with noise levels of the order of 0.10-0.15 mmag allowing detection of the modes with amplitudes larger than $\sim$0.5 mmag. This is similar to the best campaigns for other $\delta$ Scuti stars;

2.

The BN Cnc spectrum is well characterized in terms of the existing mode set making the spectral analysis feasible. No significant changes in amplitudes from previous season were found and only one new mode was detected;

3.

The BV Cnc spectrum shows a set of low amplitude modes consistent with those previously seen, but with decreased amplitudes;

4.

Multisite differential CCD photometry at the best level is a non-trivial job as it involves organizing many sites with good quality equipment and observers familiar with all the procedures.

The data will be made available in the IAU Commission 27 Archives of Unpublished Observations.

Acknowledgements

Part of this work was supported by the German Deutsche Forschungsgemeinschaft, DFG project number Ts 17/2-1. This work was also supported in part by grant in Portugal PESO/P/PRO/1196/97'' as well as by the Fund for Scientific Research (FWO) and by the Flemish Ministry for Foreign Policy, European Affairs, Science and Technology. M. Breger and the APT were supported by the Austrian Fonds zur Förderung der wissenschaftlichen Forschung. The IAC80 telescope is operated by the Instituto de Astrofísica de Canarias in the Spanish Observatorio del Teide. The Konkoly team thanks A. Frontó for his collaboration in the observations. The Porto team thanks A. Pedrosa for his collaboration with the observations.