diff --git a/pyzebra/load_1D.py b/pyzebra/load_1D.py
index cd1c75b..0d049a5 100644
--- a/pyzebra/load_1D.py
+++ b/pyzebra/load_1D.py
@@ -132,8 +132,8 @@ def parse_1D(fileobj, data_type):
                 d["number_of_measurements"] = int(next_line.split()[0])
                 d["angle_step"] = float(next_line.split()[1])
                 d["monitor"] = float(next_line.split()[2])
-                d["unkwn1"] = float(next_line.split()[3])
-                d["unkwn2"] = float(next_line.split()[4])
+                d["temperature"] = float(next_line.split()[3])
+                d["mag_field"] = float(next_line.split()[4])
                 d["date"] = str(next_line.split()[5])
                 d["time"] = str(next_line.split()[6])
                 d["scan_type"] = str(next_line.split()[7])