Strange actions in powerOn()

Hello, in function powerOn() I see that whole register POWER_CTL value instantly being changed from 0 to 16 and eventually to 8. 

	writeTo(ADXL345_POWER_CTL, 0);	// Wakeup
	writeTo(ADXL345_POWER_CTL, 16);	// Auto_Sleep
	writeTo(ADXL345_POWER_CTL, 8);	// Measure

Maybe you wanted to set all these bits ( 8Hz Frequency and AutoSleep and Measuring mode )?  e.g. 24?