These mean values, ranges and amplitudes are all measured in volts per metre (in the open).
The basins of the Parana and Paraguay are separated by low mountain ranges extending north from the sierras of Paraguay.
This mountainous tract, which has an average breadth of from 50 to 60 m., is bounded west by the plain of Campania, now called the Terra di Lavoro, and east by the much broader and more extensive tract of Apulia or Puglia, composed partly of level plains, but for the most part of undulating downs, contrasting strongly with the mountain ranges of the Apennines, which rise abruptly above them.
Indeed, by standing on tiptoe I could catch a glimpse of some of the peaks of the still bluer and more distant mountain ranges in the northwest, those true-blue coins from heaven's own mint, and also of some portion of the village.
Only low brush could grow in so small a space... no trees to prevent a vehicle from plunging into the forested mountain ranges below and beyond.